2019中考英語必備習(xí)題精編 專題6 完形填空 精講二 議論 說明（含解析）

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1、完形填空 第二節(jié) （2018·云南昆明）完形填空 從A、B、C、D三個選項(xiàng)中選出能填入空白處的最佳答案。（共10小題，每小題1分，滿分10分） Space travel is nothing new. The first spaceship with a human was sent up 36 space in 1961. Since then, people have not only travelled to space, 37 many of them have also lived there in space stations for some time.

2、 The Soviet Union（蘇聯(lián)）sent the 38 space station into space in 1971. This space station was called Salyut I. It 39 as a place where people could live while they observed space and did experiments. The first group of astronauts lived there for 23 days. The Soviet Union went on to make seven mor

3、e Salyut space stations. At about the same time, the United States had 40 own space station, called Skylab. Astronauts 41 in these space stations for a short time. However, it wasn’t until the late 1980s when the Soviet Union sent the Mir space station that people began to live in space for a

4、 42 time. Living in space stations seems to be fun, but astronauts face many problems. One of them 43 food. All the 44 on space stations are put together on Earth and sent there by spaceship. Because the food has to last a long time, a lot of it has to be stored in cans. The space station do

5、es not have a fridge, but it has a cool room to keep fruit and vegetables fresh. Astronauts also eat many other foods 45 dried meat that do not need special care. 36. A. into B. with C. of 37. A. for B. but C. unless 38. A. ones

6、 B. one C. first 39. A. found B. was built C. was bought 40. A. them B. they C. its 41. A. lived B. played C. took 42. A. more B. shorter C. longer 43. A. am

7、 B. is C. are 44. A. apple B. vegetable C. meals 45. A. such as B. at last C. next to 體裁 說明文 話題 太空探索 詞數(shù) 242 主旨大意：本文是一篇科普說明文，主要介紹了宇宙飛船、太空站及宇航員的太空生活。 36. A考查介詞辨析。由set up into“發(fā)射進(jìn)入”可知。故選A。 37. B考查固定搭配。not only… bu

8、t (also)為固定搭配，意為“不僅……；而且……”。故選B。 38. C考查數(shù)詞。句意：1971年蘇聯(lián)向太空發(fā)射了第一個太空站。first表示“第一”。故選C。 39. B考查被動語態(tài)。be built意為“被修建為……”。故選B。 40. C考查代詞辨析。根據(jù)主語the United States可知應(yīng)選its“它的”。故選C。 41. A考查動詞辨析。結(jié)合下句的“…began to live in space…”可知應(yīng)選A。 42. C考查形容詞辨析。結(jié)合上句中的“…for a short time”可知此處表示“時間更長了些”，故選C。 43. B考查主謂一致。one o

9、f them意為“其中之一”，為單數(shù)形式，故用is。故選B。 44. C考查主謂一致。根據(jù)此句中的are可知主語為復(fù)數(shù)形式，三個選項(xiàng)中只有C項(xiàng)是復(fù)數(shù)形式，故選C。 45. A考查固定搭配。such as例如；at last最后，終于；next to靠近，空后為空前many other foods所舉的例子，故選A。 二、(2018·江蘇徐州) 完形填空（共 15 小題，每小題 1 分， 滿分 15 分 ） 根據(jù)短文內(nèi)容，從各題所給的A、B、C、D 四個選項(xiàng)中選出最佳選項(xiàng)。 (2018·江蘇徐州) What will the future world be

10、like? Many people are glad to give their 16 . Here are two imaginations about the world of 17 . ●When people talk about the future, we like to think that we'll have our own personal flying car. We would fly at 480 kilometres per hour, avoiding traffic lights, 18 roads and speeding ti

11、ckets. 19 , some people point to the disadvantages of flying cars. One big problem is: what will happen if the flying cars 20 ? Then there will be problems with traffic control. Also, if 21 become popular, there will surely be too much air traffic. 22 it seems that flying cars will

12、 face more than a few problems if they are to get off the ground! ●Imagine you have your own Ironman 23 . Several companies are trying to build a practical robot "exoskeleton". This is a suit of robot arms and legs which follows your movement. It will 24 the wearer to lift heavy objects,

13、 walk a long way and even punch through walls! It is 25 in many ways, especially for people with disabilities. This suit might help people to walk again after 26 or injury (受傷). But the disadvantage at the moment is the 27 . Even a simple suit can cost hundreds of thousands of pou

14、nds. Another problem is battery life. A suit like this needs a lot of 28 and batteries only last about 15 minutes at the moment. One other problem is that a badly programmed robot suit could 29 the wearer. You wouldn't want your robot leg or arm bending (彎曲) the wrong way. So in the futur

15、e, 30 we might be able to fly to work and lift a car above our heads, there are plenty of problems to solve before this will be possible. 16. A. suggestions B. instructions C. opinions D. reasons 17. A. past B. yesterday C. present D. tomorrow 18. A. empty B. wide

16、 C. busy D. dirty 19. A. Moreover B. Instead C. In fact D. However 20. A. put down B. break down C. write down D. calm down 21. A. they B. you C. we D. I 22. A. And B. But C. So D. Or 23. A. gloves B. suit C. helmet D. shoes 24. A.

17、ask B. wish C. invite D. allow 25. A. beautiful B. peaceful C. colorful D. useful 26. A. disease B. holiday C. work D. party 27. A. quality B. price C. need D. number 28. A. chances B. power C. rest D. experience 29. A. hurt B. attract C. protect D. attack

18、 30. A. whether B. unless C. although D. until 體裁 科普文 話題 未來的世界 詞數(shù) 305 【主旨大意】 本文是一篇說明文。介紹了未來廣泛使用飛車的好處和弊端和將來穿上鋼鐵俠套裝后的強(qiáng)大的功能。 16. C 考查名詞詞義辨析。從前句的提問：What will the future world be like?未來世界是個什么樣子。推斷本句是，許多人樂意給出他們的觀點(diǎn)。故選C。 17. D 考查名詞詞義辨析。從前句的提問：What will the future world be l

19、ike?未來世界是個什么樣子。由此推知，本句是，這里是有關(guān)未來世界的設(shè)想。故選D。 18. C 考查形容詞詞義辨析。句意：我們駕駛時速每小時480公里的飛車能夠避免交通燈，繁忙的道路，超速的罰單。故選C。 19. D 考查副詞詞義辨析。句意：有些人指出了飛車的缺點(diǎn)。與前面介紹飛車的優(yōu)點(diǎn)構(gòu)成轉(zhuǎn)折關(guān)系。根據(jù)前后句之間的邏輯關(guān)系，故用 However 然而。故選D。 20. B 考查動詞短語辨析。分析后句Then there will be problems with traffic control.交通管理方面將有問題，得出本句句意：如果飛車壞了，將發(fā)生什么情況呢？故選B。 21. A 考

20、查代詞詞義辨析。根據(jù)前文介紹可知，這里都是講飛車流行會帶來的問題。根據(jù)句意：飛車流行起來，一定有太多的空中交通?？芍@里指的是“飛車”。用第三人稱復(fù)數(shù)，做主語。故選A。 22. C 考查連詞詞義辨析。由前句Also, if 21 become popular, there will surely be too much air traffic.得出本句的結(jié)論 22 it seems that flying cars will face more than a few problems if they are to get off the ground!引出結(jié)論用連詞so。故選C

21、。 23. B 考查名詞詞義辨析。跳讀后句This is a suit of robot arms and legs which follows your movement.理解句意：設(shè)想你擁有你自己的鋼鐵俠套裝。故選B。 24. D 考查動詞詞義辨析。理解句意：它能讓穿戴者拎重物，走長途，甚至穿墻。根據(jù)句意可知選D。 25. D 考查形容詞詞義辨析。根據(jù)前句It will 24 the wearer to lift heavy objects, walk a long way and even punch through walls!.知，它在許多方面是有用的。故選D。 2

22、6. A 考查名詞詞義辨析。理解句意：這套裝能幫助受傷或生病的人重新走起來。故選A。 27. B 考查名詞詞義辨析。從空后的內(nèi)容Even a simple suit can cost hundreds of thousands of pounds.知，價(jià)格昂貴問題是它的缺點(diǎn)。故選B。 28. B 考查名詞詞義辨析。從上句“Another problem is battery life.”以及后句中的batteries only last about 15 minutes at the moment.知，這套裝需要許多能量。故選B。 29. A 考查動詞詞義辨析。理解句意：另一個問題是破壞

23、了程序的機(jī)器人套裝能夠傷了穿戴者。故選A。 30. C 考查連詞詞義辨析。根據(jù)選項(xiàng)理解句意：因此在將來，雖然我們可能飛去上班，能把小汽車舉過頭，但是在這種情況發(fā)生之前有許多問題要解決。故選C。 二、(2018·黑龍江哈爾濱)完形填空（本題共10分，每小題1分） No matter who you are and where you live, the most important thing is what kind of person you are. There are many good qualities that can benefit you a lot in yo

24、ur life. Among them, the following 21 qualities are the most helpful ones. Have a 22 attitude. Life is not always a bed of roses. When facing difficulties, don’t lose heart. Do you know what can help you overcome difficulties? It’s your attitude. Cheer up! Life is like a 23 . When you smi

25、le in front of it, it will also smile at you. Keep learning. Maybe you 24 your present life. Every day you have 25 much work to do that you can’t find any time to learn. However, the world around you is changing all the time. Never be satisfied with yourself, 26 you will fall behind oth

26、ers. 27 learning can help you get success in the future. Be creative. In modern society, the students who have creative thinking are needed most. Being creative means 28 new ideas and having creative imagination. Those who are creative have more choices in their life. Be honest and keep yo

27、ur promise. Honesty is the best policy(原則). 29 likes a person who tells lies. The one who keeps his word is popular everywhere. As long as you have these qualities 30 above, you will be excellent and make a difference to the world. Albert Einstein once said, “Try not to become a man of s

28、uccess but rather try to become a man of value.” 根據(jù)短文內(nèi)容選擇最佳答案。 21. A. three B. four C. five 22. A. negative B. positive C. sad 23. A. board B. stone C. mirror 24. A. are used to B. are used

29、 for C. used to 25. A. too B. so C. such 26. A. and B. but C. or 27. A. Keep B. Keeping C. Keeps 28. A. coming up with B. catching up with C. calling up 29. A. Everyb

30、ody B. Nobody C. Somebody 30. A. that is mentioned B. mentioning C. mentioned 體裁 議論文 話題 個人修養(yǎng) 詞數(shù) 257 【主旨大意】本篇是一篇議論文。文章指出了如何提高個人的品質(zhì)。 21. B 根據(jù)下文具體給出的例子可在此處是四個。故選B。 22. B 根據(jù)下午可知要擁有積極的態(tài)度，故選B。 23. C 根據(jù)下文當(dāng)我們在它之前笑時，它也會笑，只有鏡子符合，故選C。 24. A 考查固定詞組，be used

31、to sth習(xí)慣于某事。故選A。 25. B 考查固定句型so...that 。句意為每天你有如此多的工作要做以至于你不能找到任何時間來學(xué)習(xí)。故選B。 26. C 考查連詞。句意是永遠(yuǎn)不要對自己感到滿足，否則你將落后于別人。 故選C。 27. D 考查動名詞做主語。故選B。 28. A 考查固定搭配。意思為有創(chuàng)造性意味著能想出更多的新主意。故選A。 29. B 考查不定代詞。句意為沒有人喜歡說謊的人。故選B。 30. C 考查被動語態(tài)。句意為只要你擁有以上這些被提到的品質(zhì)。。故選C。 Ⅱ.(2018·黑龍江龍東) Close test(本題共15分，每小題1分) Choose

32、the best answer to complete the passage. We can see the mobile phone freaks(手機(jī)控) everywhere nowadays. Can you 21 when we started to take our mobiles to a dinner table? This happens a lot, especially when we eat out. When a dish comes, we 22 our mobiles and take photos of the food first ins

33、tead of eating. After that, we post the photos on Weibo or WeChat, 23 to be “l(fā)iked”. Then we may check our mobiles from time to time during the meal, to see 24 we get “l(fā)iked” or not. We just can’t leave our mobiles for only a meal. Does that sound familiar to you? Do you do that often? I

34、f not, how do you feel when 25 people do that? A recent 26 shows that spending time on photos of food 27 the food less pleasant. To test this, some researchers did an experiment. Some people were asked to take photos 28 they could enjoy food. As a result, it showed that the more

35、 photos they took, the 29 the food seemed to them. So, please don’t take photos and just enjoy the food in front of you. 30 the result, there are also some other bad 31 of taking photos and posting the photos on the Internet before meals. 32 , they will check their mobiles ma

36、ny times, “Does everyone like my 33 ? I hope a lot of people like them!” It seems that your mobile secretly calls your name all the time, even when you are with real people. So next time when you go out for dinner with your family or friends, how about 34 photos of food? Let the food

37、be delicious as it is and share your life 35 people around you. 21. A. remember B. forget C. believe 22. A. take in B. take up C. take out 23. A. wait B. waited C. waiting 24. A. if B. whether C. which 25. A. other B. others C. the other 26. A. news B. st

38、udy C. information 27. A. makes B. made C. making 28. A. but B. before C. after 29. A. less delicious B. delicious C. more delicious 30. A. Except B. Beside C. Besides 31. A. disadvantages B. expressions C. influences 32. A. Such as B. For example C. Li

39、ke 33. A. photos B. mobiles C. food 34. A. take B. taking C. not taking 35. A. to B. with C. at 題材 調(diào)查報(bào)告 話題 發(fā)明與技術(shù) 詞數(shù) 287 【主旨大意】本文是一篇調(diào)查報(bào)告。文章講述了手機(jī)對于人們生活的影響。許多人吃飯時先拍照，分享朋友圈。讓飯就變得不是那么美味。文章呼吁人們花更多時間和周邊人相處，不做手機(jī)奴隸。 21. A考查動詞詞義。句意：你能_________當(dāng)我們開始帶著我們的手機(jī)來到餐桌？remember記著；f

40、orget 忘記；believe相信。根據(jù)詞義可知是記著，故選A.。 22. C 考查動詞搭配。句意：當(dāng)上菜了，我們_________我們的手機(jī)并且先照相而不是先用餐。take in 吸入；take up 占據(jù)；take out 拿出。由句意可推知，我們拿出我們的手機(jī)并拍照，故選C。 23. C考查謂語變化。句意：之后，我們把照片發(fā)到微博和微信上，等著被贊。動詞ing形式表伴隨，句子中已經(jīng)有一個謂語了之后的謂語應(yīng)用doing或to do形式，逗號后面只能接doing。故選C。 24. B考查連詞。句意：然后我們會在吃飯過程中時常查詢我們的手機(jī)，來看我們 __________得到了贊。這里

41、可推知是是否的意思，if和whether都有是否的意思，但是后面有or not 只能用whether。故選B。 25. A 考查不定代詞詞義辨析。句意：當(dāng)別人這樣做時， 你的感受是什么？ other其他的，后面接名詞復(fù)數(shù)；others名詞，別人；the other用于兩者中的另外一個。故選A。 26. B考查名詞詞義。句意：研究表明：花時間在食物照片上，會讓食物不那么讓人愉悅。news消息；study研究；information信息。由句意可得知是研究，故選B。 27. C考查非謂語動詞。。句意：花時間在食物照片上，會讓食物不那么讓人愉悅。由spend...doing可知。故選C。 2

42、8. B考查連詞意義。句意：一些人被要求在享受食物之前先拍照。but但是，表示轉(zhuǎn)折；before在......之前；after在......之后。根據(jù)語境，故選B。 29. A 考查形容詞的比較級。句意：他們拍的照片越多，食物就越不美味。the—+比較級，the+比較級。越......越......由語境可知，故選A。 30. C考查介詞詞義辨析。句意：除了這個結(jié)果之外，還有其他一些壞的影響在飯前拍照和上傳照片到網(wǎng)上。except除之外，沒有啦；besides...除之外，還有；beside在......旁邊。由語境可知，由also可以得知，還有。故選C。 31. C考查名詞詞義。句意：

43、還有其他一些壞的影響在飯前拍照和上傳照片到網(wǎng)上。. disadvantages缺點(diǎn)；expressions表達(dá)方式; influences影響。根據(jù)詞義可知，故選C。 32. B 考查介詞短語。句意：例如，他們會拿出手機(jī)，看很多次。such as 例如，后面接短語； for example舉例，后面接句子；like像。由句子they will check their mobiles many times,可推知，故選B。 33. A考查名詞意義。句意：人們會喜歡我的照片嗎？ photos圖片; mobiles手機(jī); food食物。上傳的是圖片。故選A。 34. C考查非謂語動詞。句意：下

44、次吃飯時，不拍照好嗎？How about之后用動名詞。根據(jù)句意，不拍照，所以用not。故選C。 35. B 考查固定詞組搭配。句意：跟你周圍的人分享你的生活。Share...with與......分享，固定詞組搭配。故選B。 B（2018?甘肅蘭州） What can lead you to success? The most important thing is what you do every day. It is very simple. Your habits will decide whether or not you are 49 in the future.

45、If you have strong and healthy good habits, it doesn’t matter whether you fail or not today, because you are sure to succeed in the end. Having good habits does not mean that you will succeed every time. However, if it goes long, you will 50 all your goals and be successful. 51 the other han

46、d, if you have strong bad habits, you are sure to fail at last. Why are habits so important? 52 you repeat the same action and the same behavior every day. A single good action will not change your life, but the same action repeated 1,000 times will have an important effect on your life. How c

47、an you 53 good habits? There is nothing easier than developing good habits. You want to make a habit, and then you must do the action every day. If you want to develop the habit of eating 54 food, eat healthily every day. If you want to develop the habit of reading, read every day. The more

48、you do an action, the easier it becomes in 55 end. 49. A. success B. succeed C. successful D. successfully 50. A. achieve B. achieved C. achieving D. achieves 51. A. In B. On C. At D. To 52. A. But B. While C. Because D. Since 53. A. find B. offer C. realize

49、 D. develop 54. A. health B. healthy C. unhealthy D. healthily 55. A. the B. an C. a D. / 體裁 說明文 話題 生活習(xí)慣 詞數(shù) 214 【主旨大意】這篇短文主要講述了成功與好的習(xí)慣息息相關(guān)，并闡述了習(xí)慣的重要性及如何養(yǎng)成好的習(xí)慣。 49. C【解析】考查詞義辨析及語境理解。success意為“成功”，名詞；succeed意為“成功”，動詞；successful意為“成功的”，形容詞；successfully意為“成功地”，副詞。本句句意為“你的習(xí)慣會決定你將

50、來是否會成功?！鼻冶揪渲小癮re”為系動詞，后需跟形容詞，故選“successful”。 50. A【解析】考查語境理解。情態(tài)動詞will后跟動詞原形，achieve one’s goals表示“實(shí)現(xiàn)目標(biāo)”，故選“achieve”。 51. B【解析】考查固定搭配。on the other hand意為“另一方面”，為固定表達(dá)，故選“On”。 52. C【解析】考查連詞辨析。But意為“但是”；While意為“當(dāng)……時候；盡管”；Because意為“因?yàn)椤?；Since意為“自……以來；由于”。根據(jù)上一句提示“Why are habits so important?”中的“Why”可知此處

51、需用Because進(jìn)行回答，故選“Because”。 53. D【解析】考查動詞辨析。find意為“發(fā)現(xiàn)”；offer意為“提供”；realize意為“意識到”；develop意為“發(fā)展”。根據(jù)下文提示“... You want to make a habit, ... If you want to develop the habit of eating ... If you want to develop the habit of reading ...”中的“make”和“develop”可知本段主要講述的是如何養(yǎng)成好的習(xí)慣，故選“develop”。 54. B【解析】考查詞義辨析及語

52、境理解。health意為“健康”，名詞；healthy意為“健康的”，形容詞；unhealthy意為“不健康的”，形容詞；healthily意為“健康地”，副詞。根據(jù)句意“如果你想養(yǎng)成吃……食物的習(xí)慣，你每天要吃得健康?！笨芍颂幈硎尽俺越】档氖澄铩?，且food為名詞，故用形容詞healthy修飾，故選“healthy”。 55. A【解析】考查固定搭配。in the end意為“最后”，為固定介詞短語，故選“the”。 (2018·黑龍江齊齊哈爾) Few people like changing their habits, good or bad. Whether it is

53、smoking, drinking or overeating, they 11._______ “enjoying” them to end. On every packet of cigarettes(香煙)，people are warned against the 12._______ of smoking: “Warning: Cigarette Smoking Is Dangerous to Your Health.” 13.________, millions of them start smoking or go on smoking. Why? Facts

54、 show that families and surroundings(環(huán)境) play a very important part in 14._______ smokers. All those smokers come from smoking families or have smoking 15.________ or relatives. Films and TV plays also play a part. People 16._______ their “heroes” on TV drinking alcohol(酒) or 17._______ cigarettes.

55、“Heroes” seem to hear 18.______, neither killing themselves nor killing others with alcohol and cigarettes. 19.________they are not afraid of the harm of smoking and drinking, why 20.________ common people be afraid? The simple warning on the cigarette packet does not influence 21._______ habit

56、s. Even stronger warnings, like showing pictures of smokers who have died of cancer, don’t seem to 22._______. Knowing and believing seem to be two 23.________ things. If smoking is really as 24.________ as doctors say, it is time for smokers to think about it and try to give it 25._______

57、! 11. A. stop B. continue C. finish 12. A. dangers B. excuses C. chances 13. A. Moreover B. Also C. However 14. A. influencing B. explaining C. improving 15. A. parents B. brothers C. friends 16. A. hear

58、 B. catch C. watch 17. A. smoke B. smoking C.to smoke 18 A. something B. nothing C. anything 19. A. If B. When C. Because 20. A. might B. shall C. should 21. A. smoker B. smoker’s C.

59、 smokers’ 22. A. make B. work C. do 23. A. different B. pleasant C. similar 24. A. harm B. harmful C. more harmful 25. A. away B. out C. up 題材 議論文 話題 身體健康 詞數(shù) 203 【主旨大意】本文是一篇議論文。吸煙喝酒危害健康，人們都知道，卻很難改變固有的一些生活習(xí)慣

60、，短文倡議人們及早認(rèn)清其危害性，認(rèn)真考慮，戒煙戒酒。 11.B 考查動詞的詞義辨析。根據(jù)上文，無論是吸煙, 飲酒或暴飲暴食, 他們_____ "享受" 他們到底。stop, finish意為“停止，結(jié)束”；continue意為“繼續(xù)”。故選B。 12.A 考查名詞的詞義辨析。根據(jù)句意，在香煙的包裝盒上，人們被警告注意吸煙的_________。danger意為“危險(xiǎn)”；excuse意為“借口”；chance意為“機(jī)會”。故選A。 13.C 考查副詞的用法。盡管煙盒上有提示，無數(shù)的人還是在開始或繼續(xù)吸煙。兩句之間為轉(zhuǎn)折關(guān)系，故選C。 14. A考查動詞的詞義辨析。根據(jù)句意，事實(shí)表明家庭和環(huán)

61、境在影響吸煙者中發(fā)揮了重要作用。故選A。 15.C 考查名詞的詞義辨析。根據(jù)句意，所有那些吸煙者來自于吸煙的家庭，或擁有吸煙的朋友或親戚。故選C。 16.C考查動詞的詞義辨析。根據(jù)句意，人們在電視上觀看….，故選C。 17.B考查動詞的用法。由上一句，watch sb doing sth意為“觀看某人在做某事”，空白處和drinking并列為動名詞，故選B。 18.B 考查不定代詞的用法。根據(jù)句意，英雄們好像什么都沒有看見，既沒有看見….也沒有看見…，故選B。 19.A 考查連詞的用法。根據(jù)句意，如果他們都不害怕吸煙喝酒的危害，那普通人為什么應(yīng)該害怕呢？if意為“如果”，故選A。

62、20.C 考查情態(tài)動詞的用法。見19小題解析，故選C。 21.C考查動詞的用法。影響的是眾多吸煙者的習(xí)慣，用復(fù)數(shù)名詞的所有格，故選C。 22.B 考查動詞的用法。根據(jù)上下文，此處填work, 意為“起作用；奏效”。故選B。 23.A 考查形容詞詞義的辨析。人們知道吸煙喝酒的危害，卻不相信真的會危害到自己，所以說知道和相信是兩件不同的事情。故選A。 24.B 考查形容詞的用法。as……as…中間用形容詞或副詞的原級，意為“…和…一樣”，harm為動詞或名詞；more harmful為比較級，故選B。 25.C考查副詞的詞義辨析。give up意為“停止；放棄”，故選C。 四、（201

63、8·廣西桂林）完形填空（每小題1分，共10分） 閱讀短文，從A、B、C、D四個選項(xiàng)中選出最佳選項(xiàng)。 There are many brave and talented people who work in different branches (分科；分支)of science. Extreme（另類的）scientists are people who work in very difficult and dangerous places. They don't work in a 46 all the time like other scientists do. Instead,

64、they search 47 information that can only be gathered through firsthand experiences. These scientists have to explore deep, dark caves, swim with sharks or act as swan（天鵝）mothers. The number of great white sharks in the world 48 smaller now. They are one of 49 animals on Earth. Scientist

65、s need to find out how many sharks 50 now. Sometimes scientists have to get very close to a shark. The easiest and 5l way to do this is from inside a shark cage（籠子）. 52 ，sometimes sharks attack （襲擊；攻擊）the cage. They shake it, and bend the bars with their sharp 53 .The trumpeter swan is the lar

66、gest swan in the world, but it 54 until it nearly became endangered birds. Because of this, parents swans 55 younger swans to migrate before. Scientists have to teach the younger swans how to do it. They teach the swans to follow a plane which looks like a lead swan. Extreme scientists are always trying to discover something new. 46. A. hospital B. factory C. lab D. hotel 47.A. for B. to C. of D. at 48.A. get B. is getting C. was