Federica Bertocchini, co-author of the study, says the worm’s ability to break down their everyday food --- beeswax--- also allows them to break down plastic. “Wax is a complex mixture, but the basic bond in polyethylene, the carbon-carbon bond, is there as well,” she explains. “The wax worm evolved a method or system to break this bond.”
Jennifer DeBruyn, a microbiologist at the University of Tennessee, who was not involved in the study, says it is not surprising that such worms can break down polyethylene. But compared with previous studies, she finds the speed of breaking down in this one exciting. The next step, DeBruyn says, will be to identify the cause of the breakdown. Is it an enzyme produced by the worm itself or by its gut microbes(肠道微生物)？
Bertocchini agrees and hopes her team’s findings might one day help employ the enzyme to break down plastics in landfills. But she expects using the chemical in some kind of industrial process --- not simply “millions of worms thrown on top of the plastic.”
28.What can we learn about the worms in the study?
A. They wind up in landfills.
B. They can consume plastics.
D. They take plastics as their everyday
C. They are newly evolved creatures. food.
29. According to Jennifer DeBruyn, the next step of the study is to _______.
A. increase the breakdown speed B. confirm the research findings C. find out the source of the enzyme breakdown
30. It can be inferred from the last paragraph that the chemical might _____.
A. be produced in factories in future B. be used to clean the oceans C. help make plastic bags D. help to raise worms
31. What is the main purpose of the passage?
A. To explain a study method on worms. B. To present a way to break down plastics. C. To introduce the diet of a special worm. D. To propose new means to keep eco-balance.
D
D. identify other means of the
Volunteering Is Fun
One afternoon I was sitting at home feeling so bored. Instead of feeling sorry for myself, I wanted to meet people and have new experiences so I decided to start volunteering. I searched on my computer and found a website where I could volunteer on a farm in France.
My time working on a farm was a new experience for me. It was basically a free holiday as food and accommodation were provided. However, it was not my typical holiday as I had to look after fifteen horses and sleep at the top of a tower in a castle! I was an awful farmer but it did not matter because I made some great friends. However, you do not need to go abroad to volunteer. I have had plenty of adventures at home as volunteering can become a hobby. For example, I love singing so I had a good laugh waving my arms in an attempt to conduct my local choir. I did slowly improve and it felt great to conduct the choir in a concert. At university, I organized a concert for charity with my friends. It was really fun finding bands and raising money for a cause we believe in.
It is true that you feel good volunteering but there are also other advantages. I once volunteered as a server at a charity sports event where the organizers gave me cupcakes to thank me for my services. I also volunteered in a charity shop so I found loads of nice cheap clothes to update my wardrobe(衣柜).
While this is all fun, my favorite aspect of volunteering is creating and sharing stories. My terrible attempts at farming have given me hilarious stories to tell! Talking to volunteers from different countries and backgrounds has also helped me learn more about the world. I feel thankful to have had so much fun with many nice people thanks to volunteering.
32. Why did the author want to be volunteer?
A. He wanted to taste new life and make friends. B. He felt ashamed of himself. C. He wanted to be a farmer. D. He wanted to go abroad.
33. The underlined word “hilarious” in the last paragraph is closest in meaning to “_____”.
A. sad
B. critical
C. awful
D. funny
34. What volunteering work did the author do?
A. Taking care of sheep.
B. Helping in an Italian farm.
C. Helping in a charity shop. D. Conducting a choir in a sports event.
35.How does the author feel according to the last paragraph? A. Curious.
B. Anxious.
C. Grateful.
D.Cautious
第二节 （共5题，每小题2分，满分10分）
根据短文内容，从短文后的选项中选出能填入空白处的最佳选项。选项中有两项为多余选项。
You’re growing up. That means you’re probably experiencing lots of changes, all at once. Your body is changing. It might even seem as if your entire self is changing. It can be confusing and even scary. 36 . And it’s good!
Growing up means that you can do more, learn more, and start to make your mark on the world. In order for that to happen, your body produces chemicals called hormones that help both body and mind grow. Hormone levels change constantly, rising and falling.
37 . But it’s partly to blame for intense emotions, surprising reactions, and mood swings.
Because of the way your brain develops, it is somewhat ruled by emotion now and through your teen years. As a result, growing up can seem like an emotional roller coaster! 38 .
●Take care of yourself. If you eat right, sleep enough, and get good exercise, your brain will be much more able to deal with the stress.
● 39 . When you feel your moods swinging or you’re upset, or confused, some quiet time will allow you to gather your thoughts and get calmer.
●Practice relaxing your body and take a deep breath when you wake up and when you go to bed. 40 . Plus, when stuff happens during the day, you’ll be able to calm yourself quickly with a deep breath or two before you react. Your body is changing.
A. Work out regularly to keep physically fit. B. Take a time-out.
C. But the truth is, it happens to every teen.
D. It will help you fall asleep ------ and start the morning right. E. Here are a few things you can do to make the ride smoother. F. This changing is needed for your body’s development.
G. Usually, these feelings settle down when you realize what is going on.
第三部分 语言知识运用（共两节，满分45分） 第一节 （共20小题；每小题1.5分，满分30分）
After typhoon, I went to the disaster-stricken area to look after rescued animals. There I met Lucy, another 41 .
Lucy operates an animal 42 center. When I came to her website, I 43 a picture of Victor, a dog. I asked Lucy about Victor. She told me that she rescued Victor from a 44 man who’d thrown him around or put him into a tiny box. Victor had 45 on Lucy’s lap for several hours while she assured him he was safe and 46 to find him a loving home.
I decided to 47 Victor. I renamed him “Chase” for his 48 for chasing everything. Months later, Chase’s love for people and his 49 nature led us to earn a therapy-dog certification and start a 50 program at the local 51 .
Kids read out to Chase to 52 their skills. Sometimes, even a kid who is 53 with reading will be comfortable doing so to a dog.
One little girl jumped up and down when she saw Chase entering the library. Her joyful enthusiasm made me 54 . When Chase greeted’ her with a 55 , she clapped and said, “Look, Mommy, he’s bowing!” Chase gave her his undivided 56 while she read him a story. When her time was up, she signed up to read again.
I’m grateful for everything about Chase that made this girl jump so 57 . I hadn’t 58 him to bow; he’d bowed naturally. I’d known the library visits would be about helping kids learn to read. But I hadn’t realized what a 59 builder those visits would be for kids who were shy or didn’t fit in. Chase was also a wonderful ambassador (形象大使) for dogs—teaching kids to be loving and 60 to animals.
41. A. journalist B. teacher 42. A. health 43. A. studied
B. rescue B. took
C. doctor C. treatment C. viewed C. bad-tempered C. slept
D. volunteer D. recovery D. commented D. kind-hearted D. barked
44. A. noble-minded B. ill-willed 45. A. trembled
B. depended
46. A. promised 47. A. support 48. A. hope 49. A. gentle 50. A. writing 51. A. library 52. A. manage 53. A. arguing 54. A. weep 55. A. bow 56. A. benefit 57. A. sadly 58. A. asked
B. managed B. adopt B. talent B. boring B. comforting B. school B. examine B. dealing B. smile B. gift B. interest B. truly B. trained
C. failed C. accompany C. desire C. competitive C. reading C. hospital C. search C. struggling C. think C. wave C. affection C. happily C. invited C. appreciation C. loyal
D. pretended D. meet D. passion D. ambitious D. learning D. nursery D. practise D. working D. stay D. hand D. attention D. properly D. chosen D. fortune D. caring
59. A. experience B. confidence 60. A. rude
B. familiar
第II卷（非选择题）
第二节 （共10小题；每小题1.5分，满分15分）
阅读下面短文，在空白处填入1个适当的单词或括号内单词的正确形式。
Da Mao and Er Shun, two pandas sent to Calgary Zoo in Canada in 2014, are being sent back to China two years ahead of schedule. The animals feed on fresh bamboo, 61_______is especially flown in for them from China. Some joked that the pandas are \too luxurious a life”. But with the pandemic(流行病)62. ( disturb) flights, fresh supplies have got delayed. According to the zoo staff, pandas are picky eaters and will reject bamboo that 63.________ ( spend ) a lot of time in transport.
The pandas are 64.________(possible) just two out of hundreds of animals who might be suffering because of the pandemic. In April, CNN reported that financial issues were forcing Neumunster Zoo in Germany 65._______( kill) some animals to feed the others； similar things 66. ( report) from the United Kingdom and other countries
吉林省白城市通榆县第一中学2019_2020学年高二英语下学期末考试题
