第18讲 九年级英语(上册） Unit 4练习题（附答案）.docx

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1、第十八讲 九年级（上册）Unit 4一、阅读理解A(2021襄阳樊城区一模改编)Recently, researchers have reported on a different way to break down different kinds of plastic. It could lead to easier, high-quality recycling, and help deal with plastic pollution. The world is full of plastic, but only 9%of plastic products are ever recycl

2、ed. Every year, over 17 trillion pounds of plastic products are washed into the oceans.But bacteria may help recycle, even when humans dont. Bacteria are tiny living thingsso small that you need a microscope (显微镜)to see them. Some bacteria can eat” other things by changing the chemicals in those thi

3、ngs into something that will help the bacteria grow.Researchers at a French company have discovered a bacterial enzyme (酉每)that can break down plastic. The enzyme, which was first found in compost (堆月巴)leaves, turns plastic into chemical “building blocks“ that can then be used to create new products

4、. The enzyme can especially break down PET, a type of plastic that is most commonly used to produce plastic bottles. It is the fifth most common type of plastic that we use.The new enzyme was uncovered in research that was published last month in the journal Nature. Researchers studied over 100, 000

5、 microorganisms (微生百勿)to find one that could break down plastic quickly. The leaf compost enzyme was first discovered in 2012. Scientists changed its genes, allowing it to break down 90% of one ton of plastic in less than 10 hours.“It had been completely forgotten, but it turned out to be the best,

6、said Professor Alain Marty, the chief science officer of Carbios.( C )1. What does the underlined word bacteria” mean in Chinese?A.垃圾B.昆虫C.细菌D.塑料( A )2.What do we know about the enzyme?A. It can break down plastic quickly.B. It is a type of bacteria.C. It can improve the growth of plants.D. It is th

7、e fifth most common type of bacteria.(B )3.What is Paragraph 4 mainly about?A. How the enzyme breaks down plastic.B. How the scientists found the new enzyme.C. How the scientists praised the new enzyme.D. How the scientists changed the enzymes genes.( A )4.What did Alain Marty mean in the last parag

8、raph?A. Better late than never.B. The new enzyme was forgotten by experts.C. They forgot to change the enzymes genes.D. It was too late to find the new enzyme.( A )5.What CANT we know from the text?A. Most of the plastic products are ever recycled.B We cant see the bacteria without a microscope.C. T

9、he enzyme was first found in compost leaves.D. PET is a type of plastic that is commonly used to build plastic bottles.B（2021深圳改编）If you have planned a trip during the summer holiday, certainly you will want to share some photos on WeChat. 6 Dont worry! Here are some tips you can follow to take wond

10、erful photos.Turn back and smile.While on the road, the moment you turn back with a smile is the most impressive. Just walk away from the camera and turn back for the most natural effect. You can also pretend to hear your name called, turn back, and run your fingers through long hair. 7Look away fro

11、m the camera.There are many ways for you to avoid looking at the camera. 8 Looking down into the distance or looking out of the window is a good option. If there is nothing to see, you can also choose to close your eyes and enjoy this moment of quietness.9Are you a little shy when facing the camera?

12、 Taking a back view photo is a good choice, which can leave room for imagination and bring a different feeling as well.Take a seat.10 If there are good places to sit down, please do it! You can pose in a variety of positions with your arms and legs.Taking the perfect photo takes time and practice. I

13、f you follow these simple tricks above, your photos will start coming out beautifully! Do not hesitate to go out with your friends and take more photos.A. Take a back view photo.B. Not every photo needs to have you stand.C. This is a fantastic way to increase your beauty.D. But what if the photos ar

14、e not as pretty as expected?E. For example, you can look up at the sky and let the camera catch your side face.6. D 7. C 8. E 9. A 10. B 二、（2021 瑞安二模）完形填空When the doorbell rang, I ran to open the front door.“Hello, Im Jose, the caipenter （木匠），said the man who stood there.“WeTe so glad youre here, Jo

15、se! ” said my father from behind me. “Fil show you the 11 .，We all went into the yard and looked up at the third floor. There was a big 12 there. It looked ugly, and birds and squirrels （才公鼠）always got in and made nests there, but now Jose would 13 it.Jose spent the afternoon cleaning the hole and c

16、utting new wood to fit in. By four oclock, the work was 14 . And we all appreciated the shining, newly painted wood.As Jose was leaving, he said, There was a squirrel up there that was 15 me. She sat on the roof and scolded （亍川斥）me non-stop. I guess she didnt want to move out, 16 shell just have to

17、find a new nest.”That evening, there was a strange 17 on the third floor-a squirrel out there was biting the new wood!18 could we stop it? We tried many ways, but all didn*t work. The squirrel kept biting 19 it opened up a big hole in the wood Jose had just replaced.I went outside and stared at the

18、squirrel. It squeezed into the hole and 20 with something in its mouth, disappearing in a tree.I ran inside and announced, Guess what! The squirrel has 21 in there!”We all went out and watched the squirrel return and get into the hole 22 , Soon it climbed down the side of the house, carrying another

19、 baby to safety. 4CI guess Jose didnt get 23 out of there after alb “ Dad said in a low voice.“And to think we were mad at the squirrel 24 destroying Joses nice work, “ said Mom. “Of course she had to 25 her babies. I understand just how she felt?9A )11.A.C.B )12.A.C.D )13.A.C.A )14.A.C.C )15.A.C.C

20、)16.A.C.D )17.A.C.C )18.A.C.D )19.A.C.C )20. A.C.B )21.A.C.C )22. A.C.A )23.A.C.B )24. A.C.D )25. A.C.A )11.A.C.B )12.A.C.D )13.A.C.A )14.A.C.C )15.A.C.C )16.A.C.D )17.A.C.C )18.A.C.D )19.A.C.C )20. A.C.B )21.A.C.C )22. A.C.A )23.A.C.B )24. A.C.D )25. A.C.problem animaltreeroom notice protect done a

21、llowed proud of angry with andor show guest Where How after sincegave up came out leaves flowers too again everything anything from against identify feedB accidentD. reasonB. holeD. woodB decorateD repairB begun D. offered B worried about D. friendly to B. but D. so B. activity D. noise B. When D. W

22、hy B. as D. until B. set off D. fell down B. babies D. enemies B early D. instead B. something D. nothing B. for D. by B- selectD. save三、语篇填空第一节（2021襄阳改编）monthreturnifmovefinalneedcrazycrowdedrealizeeveryoneI was going to buy some fruit and medicine for my headache. After I parked my car, I went int

23、o the market. It wasn*t as 26 as I had expected. Only a few people were shopping in it.In the market, I saw a little girl sitting in a shopping cart （购物车）.She looked to be 927old with blond curly hair and blue eyes.She was such a lovely girl that I couldn*t 28 my eyes away. Then I did what I always

24、do with children: I gave her my best smile. I may have looked a bit 29 ， but it came from my heart.Fve learned that everyone 30 a smile sometimes, even strangers at the market in a rush to get home.It took her time to decide just how to deal with my smile. But 31 she smiled.I laughed and waved （守军手）

25、goodbye. And she blew me a kiss.That put a smile on my face and then I got a smile in 32 from every shopper I passed.I was still smiling when I got home and 33 Id forgotten to get medicine. Luckily, I didnt need it. My headache was gone.Want to change the world? Try smiling. In that simple exchange

26、of 34 smiles, this tiring world would become a better place.35 youre lucky, youll be blown a kiss and it may make your headache go away.27. months29. crazy31. 3nally33. realized35. If26. crowded28. move30. needs32. return34. everyones 第二节（2021铜仁改编）What do you know about Mars? What does it look like?

27、Mars is the fourth planet from the sun in our solar system and is named after Mars, the Roman god of war. Its diameter （直径）is 53%36 wide as that of the earth. You can tell _37planet is Mars because it is bright red in the night sky. It looks like a red and orange ball. Its very beautiful. But during

28、 spring and summer, the surface of Mars 38 covered by strong storms. The gravity on the surface of Mars is about two-fifths as strong as it is on earth. So a person who weighs 90 kilos on earth weighs only 36 kilos on Mars. The temperature on Mars is between 1383928. The air has only 0.13% oxygen.It

29、 takes a spaceship about eight months 40 reach Mars from the earth when the two planets are closest to each other. Scientists are still searching for more information about Mars.36. as 37. which 38. is39. and 40. to四、（2021 眉山改编）补全对话A: What are you planning to do after graduation, Nick?B: Im not quit

30、e sure. My parents want me to be a computer programmer, because they think Im good at computer science.A: I think so. By the way, 41 what do your parents do/ what are your parents/ ？B: My father is an engineer and my mother is a doctor. 42. What do you want to be/ Whats vour dream iob/. ?A: Well, Pd

31、 love to be a doctor. I want to help sick people.B: 43. Thats great/ Sounds great A: But I havent decided whether to work in a hospital or go abroad for further study. 44. Can/May I ask your mom for some advice/. ？B: Certainly. You can come to my home on Saturday evening. She is always busy from Monday to Friday.A: OK. 45 Thank you/ Thaaks/. .B: Youre welcome.