Đề ôn thi TN THPT 2023 môn Tiếng Anh - Trường THPT Nguyễn Đăng Đạo (Có đáp án)

Nội dung tài liệu: Đề ôn thi TN THPT 2023 môn Tiếng Anh - Trường THPT Nguyễn Đăng Đạo (Có đáp án)

1. SỞ GD & ĐT BẮC NINH ĐỀ THAM KHẢO KÌ THI TNTHPT NĂM 2023 TRƯỜNG THPT NGUYỄN ĐĂNG ĐẠO BÀI THI : NGOẠI NGỮ - MÔNTHI :TIẾNG ANH Thời gian làm bài: 60 phút; không kể thời gian phát đề (Đề thi gồm có 6 trang) ( 50 câu trắc nghiệm) Mark the letter A, B, C, or D to indicate the word whose underlined part differs from the other three in pronunciation in each of the following questions. Question 1: A. change B. choose C. check D. chef Question 2: A. teach B. spread C. reach D. team Mark the letter A, B, C, or D to indicate the word that differs from the other three in the position of the primary stress in each of the following questions. Question 3: A. combine B. answer C. afford D. promote Question 4: A. coverage B. applicant C. achievement D. dealership Mark the letter A, B, C or D to indicate the correct answer to each of the following questions. Question 5: Many of the pictures ___ from outer space are presently on display in the public library. A. sending B. sent C. having sent D. were sent Question 6: This is ___ interesting exhibition I’ve ever visited. A. more B. less C. most D. the most Question 7: He will take the dog out for a walk ___ . A. as soon as he finishes dinner B. after he had finished dinner C. when he finished dinner D. by the time he will have finished dinner Question 8: The president is responsible ___ the policy of the government. A. at B. about C. in D. for Question 9: Your mother can speak English and Chinese very well, ___? A. didn’t she B. won’t she C. can’t she D. doesn’t she Question 10: Many ambulances took ___ injured to a nearby hospital. A. an B. a C. the D. no article Question 11: There are usually a lot of job seekers applying for one position. Only a few of them are ___ for an interview. A. shortlisted B. listed C. screened D. tested Question 12: Candidates are requested to ___ the form to the admissions officer by July 25th. A. fill out B. show up C. pass over D. hand in Question 13: The thief didn't admit ___ the money. A. to steal B. stolen C. stealing D. to be stolen Question 14: You can talk till the ___ come home – you’ll never make me change my mind. A. sheep B. cows C. dogs D. chickens Question 15: We ___ waiting for her half an hour before she came. A. have been B. will be C. will have been D. had been Question 16: Most young people want to ___ an independent life without being influenced by anyone. A. lay B. put C. lead D. bring Question 17: The picnic ___ because Peter has just had a traffic accident. A. will cancel B. will be cancelling C. will be cancelled D. will have cancelled Question 18: With very high price of oil, people have to ___ on petrol. A. economy B. economize C. economic D. economically 1
2. Question 19: Our new classmate, John is a bit of a rough ___ but I think I’m going to like him once I get used to him. A. stone B. rock C. diamond D. pearl Mark the letter A, B, C, or D on your answer sheet to indicate the sentence that best completes each of the following exchanges Question 20: Nam and Mai are having a party at Nam’s house. - Nam: “Would you like to have some more dessert, Mai?” - Mai: “___. I’m full.” A. That would be great B. Yes, I like your party C. Yes, please D. No, thanks Question 21: Tim and Peter had a quarrel last week and now Tom is giving Tim advice. - Tom: “I think the best way to solve that problem is to keep silent.” - Tim: “___. Silence may kill our friendship.” A. That’s a great idea B. That’s not a good idea C. I’m not wrong D. Yes, I think much Mark the letter A, B, C or D to indicate the word(s) OPPOSITE in meaning to the underlined word(s) in each of the following questions. Question 22: It just gave you a stronger motivation for doing what you already knew was right. A. discouragement B. emotion C. feeling D. inspiration Question 23: Don't tell Jane anything about the surprise party for Jack. She has got a big mouth. A. can't eat a lot B. hates parties C. talks too much D. can keep secrets Mark the letter A, B, C or D to indicate the word(s) CLOSEST in meaning to the underlined word(s) in each of the following questions. Question 24: Finally, Amy decided to quit her job as she couldn't stand doing the same things days in days out. It's so monotonous! A. easy B. low-paid C. tedious D. secure Question 25: Hundreds of thousands of elephants were illegally poached and their tusks sold for profits. A. conserved B. preserved C. captured D. hunted Mark the letter A, B, C, or D on your answer sheet to indicate the sentence that is closest in meaning to each of the following questions Question 26: It is unnecessary for you to finish the report until tomorrow afternoon A.You needn’t finish the report until tomorrow afternoon. B.You have to finish the report unitl tomorrow afternoon. C.You may finish the report after tomorrow afternoon. D.You should finish the report until tomorrow afternoon Question 27: Peter has not had his hair cut for over four months. A. It’s over four months since Peter has his hair cut. B. It’s over four months since Peter has had his hair cut C. It’s over four months since Peter had his hair cut D. It’s over four months since Peter had had his hair cut Question 28: “Where can I buy a phone card in this city?” he asked. A. He asked me where could he buy a phone card in that city. B. He asked me where he could buy a phone card in that city. C. He wanted to know where I could buy a phone card in that city. D. He wanted to know where he can buy a phone card in that city. 2
3. Mark the letter A, B, C, or D on your answer sheet to indicate the underlined part that needs correction in each of the following questions. Question 29: Her father used to be a distinguishable professor at the university. Many students worshipped him. A. distinguishable B.at C. Many students D. worshipped Question 30: Since 1980, scientists all over the world did a lot of things to fight against AIDS. A. the B. did C. of D. against Question 31: Neither the Minister nor the colleagues has given an explanation for the chaos in the financial market last week. A. Neither B. has given C. for D. financial Mark the letter A, B, C, or D on your answer sheet to indicate the sentence that best combines each pair of sentences in the following questions Question 32: The car driver in front stopped so suddenly. Therefore, the accident happened. A. If the car driver in front didn’t stop so suddenly, the accident wouldn’t happen. B. If the car driver in front hadn’t stopped so suddenly, the accident wouldn’t have happened. C. If the car driver in front hadn’t stopped so suddenly, the accident would have happened. D. If the car driver in front had stopped suddenly, the accident would have happened. Question 33: The soccer team knew they lost the match. They soon started to blame each other. A. Not only did the soccer team lose the match but they blamed each other as well. B. No sooner had the soccer team started to blame each other than they knew they lost the match. C. As soon as they blamed each other, the soccer team knew they lost the match. D. Hardly had the soccer team known they lost the match when they started to blame each other. Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct word or phrase that best fits each of the numbered blanks from 25 -29 Wind is a clean source of renewable energy that produces no air or water pollution. And since the wind is free, operational costs are nearly zero (34) ___ a turbine is erected. Mass production and technology advances are making turbines cheaper, and (35) ___ governments offer tax incentives to spur wind-energy development. Drawbacks include complaints from (36) ___ that wind turbines are ugly and noisy. The slowly rotating blades can also kill birds and bats, but not nearly as many as cars, power lines, and high-rise buildings do. The wind is also variable: If it's not blowing, there's no electricity generated. Nevertheless, the wind energy industry is (37) ___ . Thanks to global efforts to combat climate change, such as the Paris Agreement, renewable energy is seeing a boom in growth, in (38) ___ wind energy has led the way. From 2000 to 2015, cumulative wind capacity around the world increased from 17,000 megawatts to more than 430,000 megawatts. In 2015, China also surpassed the EU in the number of installed wind turbines and continues to lead installation efforts. (Adapted from Question 34: A. so that B. though C. therefore D. once Question 35: A. many B. little C. much D. a little Question 36: A. foreigners B. masters C. locals D. levels Question 37: A. worrying B. booming C. informing D. relating Question 38: A. which B. when C. why D. who Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions from 30- 34 The costs and benefits of global warming will vary greatly from area to area. For moderate climate change, the balance can be difficult to assess. But the larger the change in climate, the more negative the 3
4. consequences will become. Global warming will probably make life harder, not easier, for most people This is mainly because we have already built enormous infrastructure based on the climate we now have. People in some temperate zones may benefit from milder winters, more abundant rainfall, and expanding crop production zones. But people in other areas will suffer from increased heat waves, coastal erosion, rising sea level more erratic rainfall, and droughts. The crops, natural vegetation, and domesticated and wild animals (including seafood) that sustain people in a given area may be unable to adapt to local or regional changes in climate. The ranges of diseases and insect pests that are limited by temperature may expand, if other environmental conditions are also favourable. In its summary report on the impacts of climate change, the Intergovernmental Panel on Climate Change stated, "Taken as a whole, the range of published evidence indicates that the net damage costs of climate change are likely to be significant and to increase over time.” Question 39. What is the main idea of the passage? A. Environment pollution is real. B. Reasons why low-lying areas are flooded. C. Solutions to global warming. D. Reasons why global warming is a problem. Question 40. In paragraph 2, the word “erratic” is closest in meaning to ___. A. predictable B. unpredictable C. changeable D. unchangeable Question 41. In paragraph 1, the word “this” refers to ___. A. harder life as a result of global warming B. easier life as a result of global warming C. climate change on global scale D. flood in low-lying areas Question 42. According to the passage, all of the following are the results of global warming EXCEPT ___. A. higher temperature B. coastal erosion C. increasing sea level D. stable rainfall Question 43. Which of the following is TRUE as the result of global warming? A. All people suffer from global warming. B. All people benefit from global warming. C. Life is more difficult for the majority of people. D. Life is easier for most people. Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions from 44 to 50 Scientists have identified two ways in which species disappear. The first is through ordinary or “background” extinctions, where species that fail to adapt are slowly replaced by more adaptable life forms. The second is when large numbers of species go to the wall in relatively short periods of biological time. There have been five such extinctions, each provoked by cataclysmic evolutionary events caused by some geological eruption, climate shift, or space junk slamming into the Earth. Scientists now believe that another mass extinction of species is currently under way – and this time human fingerprints are on the trigger. How are we are doing it? Simply by demanding more and more space for ourselves. In our assault on the ecosystems around us we have used a number of tools, from spear and gun to bulldozer and chainsaw. Certain especially rich ecosystems have proved the most vulnerable. In Hawaii more than half of the native birds are now gone – some 50 species. Such carnage has taken place all across the island communities of the Pacific and Indian oceans. While many species were hunted to extinction, others simply succumbed to the ‘introduced predators’ that humans brought with them: the cat, the dog, the pig, and the rat. 4
5. Today the tempo of extinction is picking up speed. Hunting is no longer the major culprit, although rare birds and animals continue to be butchered for their skin, feathers, tusks, and internal organs, or taken as savage pets. Today the main threat comes from the destruction of the habitat of wild plants, animals, and insects need to survive. The draining and damming of wetland and river courses threatens the aquatic food chain and our own seafood industry. Overfishing and the destruction of fragile coral reefs destroy ocean biodiversity. Deforestation is taking a staggering toll, particularly in the tropics where the most global biodiversity is at risk. The shinking rainforest cover of the Congo and Amazon river basins and such place as Borneo and Madagascar have a wealth of species per hectare existing nowhere else. As those precious hectares are drowned or turned into arid pasture and cropland, such species disappear forever. Question 44. What does the passage mainly discuss? A. Human activity and its impact on a mass extinction of species B. The two ways in which species disappear C. The tempo of extinction of species today D. Deforestation as a major cause of mass extinctions of species Question 45. The word assault in paragraph 2 is closest in meaning to ___ A. development B. attack C. effort D. influence Question 46. The word butchered in paragraph 3 is closest in meaning to ___ A. raised B. traded C. cooked D. killed Question 47. The word them in paragraph 2 refers to ___ A. species B. oceans C. humans D. predators Question 48. What was the main threat to biodiversity in Hawaii and other islands in the Pacific and Indian oceans until recently? A. tools used by human beings B. human assault on ecosystems C. vulnerable rich ecosystems D. hunters and introduced predators Question 49. All of the following are mentioned as a form of habitat destruction EXCEPT ___ A. destroying coral reefs B. cutting down forests C. damming wetlands and rivers D. hunting rare birds and animals Question 50. It can be inferred from the passage that ___ A. the current mass extinction is different from the other five in that it is caused by humans B. hunting is the major contributing factor that speeds up the extinction of species C. habitat destruction makes a minor contribution to the current mass extinction of species D. it’s impossible for scientists to identify the causes of mass extinctions of species THE END 5
6. SỞ GD & ĐT BẮC NINH ĐỀ THAM KHẢO KÌ THI TNTHPT NĂM 2023 TRƯỜNG THPT NGUYỄN ĐĂNG BÀI THI : NGOẠI NGỮ MÔNTHI :TIẾNG ANH ĐẠO Thời gian làm bài: 60 phút; không kể thời gian phát đề ( 50 câu trắc nghiệm) (Đề thi gồm có 6 trang) Mark the letter A, B, C, or D to indicate the word whose underlined part differs from the other three in pronunciation in each of the following questions. Question 1: A. change B. choose C. check D. chef Question 2: A. teach B. spread C. reach D. team Mark the letter A, B, C, or D to indicate the word that differs from the other three in the position of the primary stress in each of the following questions. Question 3: A. combine B. answer C. afford D. promote Question 4: A. coverage B. applicant C. achievement D. dealership Mark the letter A, B, C or D to indicate the correct answer to each of the following questions. Question 5: Many of the pictures ___ from outer space are presently on display in the public library. A. sending B. sent C. having sent D. were sent Question 6: This is ___ interesting exhibition I’ve ever visited. A. more B. less C. most D. the most Question 7: He will take the dog out for a walk ___ . A. as soon as he finishes dinner B. after he had finished dinner C. when he finished dinner D. by the time he will have finished dinner Question 8: The president is responsible ___ the policy of the government. A. at B. about C. in D. for Question 9: Your mother can speak English and Chinese very well, ___? A. didn’t she B. won’t she C. can’t she D. doesn’t she Question 10: Many ambulances took ___ injured to a nearby hospital. A. an B. a C. the D. no article Question 11: There are usually a lot of job seekers applying for one position. Only a few of them are ___ for an interview. A. shortlisted B. listed C. screened D. tested Question 12: Candidates are requested to ___ the form to the admissions officer by July 25th. A. fill out B. show up C. pass over D. hand in Question 13: The thief didn't admit ___ the money. A. to steal B. stolen C. stealing D. to be stolen Question 14: You can talk till the ___ come home – you’ll never make me change my mind. A. sheep B. cows C. dogs D. chickens Question 15: We ___ waiting for her half an hour before she came. A. have been B. will be C. will have been D. had been Question 16: Most young people want to ___ an independent life without being influenced by anyone. A. lay B. put C. lead D. bring Question 17: The picnic ___ because Peter has just had a traffic accident. A. will cancel B. will be cancelling C. will be cancelled D. will have cancelled Question 18: With very high price of oil, people have to ___ on petrol. A. economy B. economize C. economic D. economically 6
7. Question 19: Our new classmate, John is a bit of a rough ___ but I think I’m going to like him once I get used to him. A. stone B. rock C. diamond D. pearl Mark the letter A, B, C, or D on your answer sheet to indicate the sentence that best completes each of the following exchanges Question 20: Nam and Mai are having a party at Nam’s house. - Nam: “Would you like to have some more dessert, Mai?” - Mai: “___. I’m full.” A. That would be great B. Yes, I like your party C. Yes, please D. No, thanks Question 21: Tim and Peter had a quarrel last week and now Tom is giving Tim advice. - Tom: “I think the best way to solve that problem is to keep silent.” - Tim: “___. Silence may kill our friendship.” A. That’s a great idea B. That’s not a good idea C. I’m not wrong D. Yes, I think much Mark the letter A, B, C or D to indicate the word(s) OPPOSITE in meaning to the underlined word(s) in each of the following questions. Question 22: It just gave you a stronger motivation for doing what you already knew was right. A. discouragement B. emotion C. feeling D. inspiration Question 23: Don't tell Jane anything about the surprise party for Jack. She has got a big mouth. A. can't eat a lot B. hates parties C. talks too much D. can keep secrets Mark the letter A, B, C or D to indicate the word(s) CLOSEST in meaning to the underlined word(s) in each of the following questions. Question 24: Finally, Amy decided to quit her job as she couldn't stand doing the same things days in days out. It's so monotonous! A. easy B. low-paid C. tedious D. secure Question 25: Hundreds of thousands of elephants were illegally poached and their tusks sold for profits. A. conserved B. preserved C. captured D. hunted Mark the letter A, B, C, or D on your answer sheet to indicate the sentence that is closest in meaning to each of the following questions Question 26: It is unnecessary for you to finish the report until tomorrow afternoon A.You needn’t finish the report until tomorrow afternoon. B.You have to finish the report unitl tomorrow afternoon. C.You may finish the report after tomorrow afternoon. D.You should finish the report until tomorrow afternoon Question 27: Peter has not had his hair cut for over four months. A. It’s over four months since Peter has his hair cut. B. It’s over four months since Peter has had his hair cut C. It’s over four months since Peter had his hair cut D. It’s over four months since Peter had had his hair cut Question 28: “Where can I buy a phone card in this city?” he asked. A. He asked me where could he buy a phone card in that city. B. He asked me where he could buy a phone card in that city. C. He wanted to know where I could buy a phone card in that city. D. He wanted to know where he can buy a phone card in that city. 7
8. Mark the letter A, B, C, or D on your answer sheet to indicate the underlined part that needs correction in each of the following questions. Question 29: Her father used to be a distinguishable professor at the university. Many students worshipped him. A. distinguishable B.at C. Many students D. worshipped Question 30: Since 1980, scientists all over the world did a lot of things to fight against AIDS. A. the B. did C. of D. against Question 31: Neither the Minister nor the colleagues has given an explanation for the chaos in the financial market last week. A. Neither B. has given C. for D. financial Mark the letter A, B, C, or D on your answer sheet to indicate the sentence that best combines each pair of sentences in the following questions Question 32: The car driver in front stopped so suddenly. Therefore, the accident happened. A. If the car driver in front didn’t stop so suddenly, the accident wouldn’t happen. B. If the car driver in front hadn’t stopped so suddenly, the accident wouldn’t have happened. C. If the car driver in front hadn’t stopped so suddenly, the accident would have happened. D. If the car driver in front had stopped suddenly, the accident would have happened. Question 33: The soccer team knew they lost the match. They soon started to blame each other. A. Not only did the soccer team lose the match but they blamed each other as well. B. No sooner had the soccer team started to blame each other than they knew they lost the match. C. As soon as they blamed each other, the soccer team knew they lost the match. D. Hardly had the soccer team known they lost the match when they started to blame each other. Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct word or phrase that best fits each of the numbered blanks from 25 -29 Wind is a clean source of renewable energy that produces no air or water pollution. And since the wind is free, operational costs are nearly zero (34) ___ a turbine is erected. Mass production and technology advances are making turbines cheaper, and (35) ___ governments offer tax incentives to spur wind-energy development. Drawbacks include complaints from (36) ___ that wind turbines are ugly and noisy. The slowly rotating blades can also kill birds and bats, but not nearly as many as cars, power lines, and high-rise buildings do. The wind is also variable: If it's not blowing, there's no electricity generated. Nevertheless, the wind energy industry is (37) ___ . Thanks to global efforts to combat climate change, such as the Paris Agreement, renewable energy is seeing a boom in growth, in (38) ___ wind energy has led the way. From 2000 to 2015, cumulative wind capacity around the world increased from 17,000 megawatts to more than 430,000 megawatts. In 2015, China also surpassed the EU in the number of installed wind turbines and continues to lead installation efforts. (Adapted from Question 34: A. so that B. though C. therefore D. once Question 35: A. many B. little C. much D. a little Question 36: A. foreigners B. masters C. locals D. levels Question 37: A. worrying B. booming C. informing D. relating Question 38: A. which B. when C. why D. who Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions from 30- 34 The costs and benefits of global warming will vary greatly from area to area. For moderate climate change, the balance can be difficult to assess. But the larger the change in climate, the more negative the 8
9. consequences will become. Global warming will probably make life harder, not easier, for most people This is mainly because we have already built enormous infrastructure based on the climate we now have. People in some temperate zones may benefit from milder winters, more abundant rainfall, and expanding crop production zones. But people in other areas will suffer from increased heat waves, coastal erosion, rising sea level more erratic rainfall, and droughts. The crops, natural vegetation, and domesticated and wild animals (including seafood) that sustain people in a given area may be unable to adapt to local or regional changes in climate. The ranges of diseases and insect pests that are limited by temperature may expand, if other environmental conditions are also favourable. In its summary report on the impacts of climate change, the Intergovernmental Panel on Climate Change stated, "Taken as a whole, the range of published evidence indicates that the net damage costs of climate change are likely to be significant and to increase over time.” Question 39. What is the main idea of the passage? A. Environment pollution is real. B. Reasons why low-lying areas are flooded. C. Solutions to global warming. D. Reasons why global warming is a problem. Question 40. In paragraph 2, the word “erratic” is closest in meaning to ___. A. predictable B. unpredictable C. changeable D. unchangeable Question 41. In paragraph 1, the word “this” refers to ___. A. harder life as a result of global warming B. easier life as a result of global warming C. climate change on global scale D. flood in low-lying areas Question 42. According to the passage, all of the following are the results of global warming EXCEPT ___. A. higher temperature B. coastal erosion C. increasing sea level D. stable rainfall Question 43. Which of the following is TRUE as the result of global warming? A. All people suffer from global warming. B. All people benefit from global warming. C. Life is more difficult for the majority of people. D. Life is easier for most people. Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions from 44 to 50 Scientists have identified two ways in which species disappear. The first is through ordinary or “background” extinctions, where species that fail to adapt are slowly replaced by more adaptable life forms. The second is when large numbers of species go to the wall in relatively short periods of biological time. There have been five such extinctions, each provoked by cataclysmic evolutionary events caused by some geological eruption, climate shift, or space junk slamming into the Earth. Scientists now believe that another mass extinction of species is currently under way – and this time human fingerprints are on the trigger. How are we are doing it? Simply by demanding more and more space for ourselves. In our assault on the ecosystems around us we have used a number of tools, from spear and gun to bulldozer and chainsaw. Certain especially rich ecosystems have proved the most vulnerable. In Hawaii more than half of the native birds are now gone – some 50 species. Such carnage has taken place all across the island communities of the Pacific and Indian oceans. While many species were hunted to extinction, others simply succumbed to the ‘introduced predators’ that humans brought with them: the cat, the dog, the pig, and the rat. 9
10. Today the tempo of extinction is picking up speed. Hunting is no longer the major culprit, although rare birds and animals continue to be butchered for their skin, feathers, tusks, and internal organs, or taken as savage pets. Today the main threat comes from the destruction of the habitat of wild plants, animals, and insects need to survive. The draining and damming of wetland and river courses threatens the aquatic food chain and our own seafood industry. Overfishing and the destruction of fragile coral reefs destroy ocean biodiversity. Deforestation is taking a staggering toll, particularly in the tropics where the most global biodiversity is at risk. The shinking rainforest cover of the Congo and Amazon river basins and such place as Borneo and Madagascar have a wealth of species per hectare existing nowhere else. As those precious hectares are drowned or turned into arid pasture and cropland, such species disappear forever. Question 44. What does the passage mainly discuss? A. The two ways in which species disappear B. Human activity and its impact on a mass extinction of species C. The tempo of extinction of species today D. Deforestation as a major cause of mass extinctions of species Question 45. The word assault in paragraph 2 is closest in meaning to ___ A. development B. attack C. effort D. influence Question 46. The word butchered in paragraph 3 is closest in meaning to ___ A. raised B. traded C. cooked D. killed Question 47. The word them in paragraph 2 refers to ___ A. species B. oceans C. humans D. predators Question 48. What was the main threat to biodiversity in Hawaii and other islands in the Pacific and Indian oceans until recently? A. tools used by human beings B. human assault on ecosystems C. vulnerable rich ecosystems D. hunters and introduced predators Question 49. All of the following are mentioned as a form of habitat destruction EXCEPT ___ A. destroying coral reefs B. cutting down forests C. damming wetlands and rivers D. hunting rare birds and animals Question 50. It can be inferred from the passage that ___ A. the current mass extinction is different from the other five in that it is caused by humans B. hunting is the major contributing factor that speeds up the extinction of species C. habitat destruction makes a minor contribution to the current mass extinction of species D. it’s impossible for scientists to identify the causes of mass extinctions of species KEYS 1D 2B 3B 4C 5B 6D 7A 8D 9C 10C 11A 12D 13C 14B 15D 16C 17C 18B 19C 20D 21B 22A 23D 24C 25D 26A 27C 28B 29A 30B 31B 32B 33D 34D 35A 36C 37B 38A 39D 40B 41A 42D 43C 44A 45B 46D 47C 48D 49D 50A 10