Unit7 The unknown world 同步练习及答案

Unit7 The unknown world 习题
一、从下面每小题的 A、B、C三个选项中选出可以替换划线部分或与其意思相近的最佳选项。
( ) 1. It is said that aliens are living in the world that is undiscovered.21世纪教育网版权所有
A. the far world B. the unknown world C. the dark world
( )2. Sara walked in fear, because she felt that someone was following her.
A. in need B. in surprise C. in horror 2·1·c·n·j·y
( )3. My mother is sleeping, so we should have a low voice.www-2-1-cnjy-com
A. keep quiet B. feel relaxed C. hurry up
( ) 4. I wonder if you could give me a hand.
A. want to guess B. want to know C. want to believe
( )5. I suggested my family going somewhere on vacation, and they agreed with me.
A. didn’t say anything
B. had the same opinion with me
C. saidno to me
( )6. You will receive a warm welcome if you come to England.21教育网
A. get B. give C. bring
( ) 7. You should stay away from the snakes, because they are dangerous creatures.
A. animals B. tools C. human beings
( ) 8. I have discovered the person who broke the window.21·cn·jy·com
A. found B. seen C. watched
( ) 9.The thing in the bowl looks terrible, and I don't want to see it again.
A. happy B. exiting C. unpleasant
( )10. Henry refused our invitation, because he was really busy.21*cnjy*com
A. recorded B. couldn’t hold C. didn’t accept
二. 语法填空。
阅读下面短文，按照句子结构的语法性和上下文连贯的要求，在空格处填入一个适当的词或者使用括号中词语的正确形式填空。【来源：21cnj*y.co*m】
Over millions of years ago, there were deserts. Now about one fifth of the Earth’s surface 11. _______ (be) deserts. The size of the world’s deserts is always 12. _______(change). Deserts can be hot or cold. The Australian Desert is a hot desert, while the Gobi Desert in Mongolia is an example of a cold desert. Deserts are dry areas 13. _______ less than 50 cm of rain falls each year. The Sahara Desert in Africa receives less than 1.5 cm a year. 14. _______ rain doesn’t fall very often in deserts, sometimes even for years, there can be heavy rain 15. _______(sudden). Because they are dry, deserts have wide changes in temperature each day. When the sun16. _______(go) up, it is very hot. At night, the heat 17. _______(receive) by the ground during the day 18. _______(quick) disappears(消失), and then it becomes very cold. Because 19. _______ the change, living in the desert is very difficult. Man can make deserts, but they can also stop them from getting larger and larger. Planting trees can prevent the sand from 20. _______(spread).
三、完形填空。
It was a fine spring day for a walk down the street. A mother and her two little girls walked along the sidewalk, happily laughing. 21 , a hundred small alien ships appeared on the horizon. It started 22 off some electric rays. People screamed. Children cried. There was 23 everywhere.【版权所有：21教育】
There came the tingling sound of glasses breaking everywhere. People fled in every 24 . The mother was jostled (推) and lost hold of her 25 . She raced around shouting and crying for her kids. She thought they were lost to her forever.21教育名师原创作品
The sky cleared up. The aliens were 26 . But there was no sight of the children. Heart-broken, the mother reached her house, crying her eyes out.21*cnjy*com
She heard someone 27 “Mamma”. Was it her kids? She frantically (慌忙地) 28 around. There they were! Hand in hand they came running towards her. She ran towards them, too. Her arms stretched out 29 to hug them. She opened her eyes. The pillow felt wet. It was a dream!21·世纪*教育网
She raced to the kids’ bedroom. Her lovely girls were sleeping peacefully. She kissed both their foreheads and 30 “love you”.
根据短文内容，选择能填入相应空白处的最佳选项
( ) 21. A. Finally B. Suddenly C. Hardly
( ) 22. A. taking B. putting C. giving
( ) 23. A. joy B. panic C. laugher 【来源：21·世纪·教育·网】
( ) 24. A. direction B. opinion C. time
( ) 25. A. friends B. students C. children
( ) 26. A. gone B. broken C. hit
( ) 27. A. sing B. talk C. call
( ) 28. A. looked B. drove C. ran
( ) 29. A. slowly B. sadly C. eagerly
( ) 30. A. shouted B. whispered C. replied
四、阅读理解。
A
We want to explore and try to better understand the world in which we live. Space exploration is one of the ways. Through the exploration of space, we can begin to unravel the mysteries of our universe, and to better know our living environment.
Space exploration provides us with knowledge about the beginning of our solar system, our own planet and ourselves. It also helps answer the questions that have puzzled us for many years. Solar system exploration is important because it is good for us.
Space technology has become an important part of our daily lives. Some technology uses satellites to communicate. Satellites are also used to examine the changes in the Earth’s climate and seas, for weather report and for military. We also use satellites in food production.?Because of the use of space technology in crops, fewer and fewer people will suffer hunger.
The space program provides a chance for nations to work together. The cooperation(合作) promotes peace and understanding between governments and their people. Many governments have taken part in the space technology, including the United States, Russia, Japan, the European nations and India. In the near future, other nations will take part in it. In fact, the United States remains the leader in new space technology.
( ) 31. The underlined word “unravel” in the first paragraph can be replaced by “_________”.
A. explain B. describe C. keep D. believe
( ) 32. What is the main idea of the second paragraph?
A. Difficulties in space exploration.
B. The advantages of space exploration.
C. The answers to the questions of space exploration.
D. What we can get from space and solar system.
( ) 33. The following are the use of satellites EXCEPT __________.
A. reporting the weather
B. examining the changes of seas
C. increasing the food production
D. changing the climate of a certain place
( ) 34. Which country is the best in new space technology?
A. The United States. B. Russia. C. Japan. D. India.
( ) 35. What can we know from the last paragraph?
A. Poor countries don’t agree to explore space.
B. People in different countries have different ideas on exploring space.
C. More and more countries will take part in the space program.
D. Many countries don’t want to work together with other countries.
B
Are you a big fan of E.T. (Extraterrestrial) or aliens? Then you should read Extraterrestrial Civilizations (《地球以外的文明世界》) by American writer Isaac Asimov (1920-1992). In his 1979 book, Asimov looked at whether there is life beyond the Earth. He also talked about how we might be able to communicate with aliens someday. Asimov even told us that there are possibly about 500,000 civilizations (文明) in the galaxy (银河系). The book may be a little out of fashion since it came out in the 70s. But you’ll still enjoy the good reasoning (推理) and imagination of it. Asimov was a science fiction (科幻故事) master. His most famous works talk about the relationship between robots and humankind.
( ) 36. Which of the following sentences best expresses the main idea?
Asimov’s books are talking about the relationship between robots and humankind .
Students are big fans of E.T.
Some students enjoy the good reasoning and imagination.2-1-c-n-j-y
Asimov was a love of E.T.
( ) 37. Asimov was a ____.
science fiction (科幻故事) master B. writer of funny story
actor D. dancer
( ) 38. Isaac Asimov comes from_____.
A. England B.America C.China D.Japan【出处：21教育名师】
( ) 39. The writer indirectly expresses that there are possibly about 500,000civilizations ______.
in America B. in Australia C. European D. in the galaxy
( ) 40. The readers will enjoy the _____.
good reasoning and imagination of it
good imagination
good expression
good understanding
五、词汇。用所给单词的正确形式填空。
41. He refused _________ (do) the housework.
42. She ________ (explanation) the reason for being late.21cnjy.com
43. The bird in the cage has beautiful__________ (feather).
44. We need several different _______ (knife) to make paper cutting.
45. I'm very pleased _______ (see) you.
46. I am very ________ (frighten) with snakes. Don't let me see them.
47. The plane landed on the _________ (land) site three hours ago.
48. There is something ________ (write) on this piece of paper.
49. Our teacher asked us not _________ (talk) to each other in class.
50. I heard a man _______ (speak) outside the house at that time, but I didn't know who he was.

Unit7 The unknown world 习题答案
一、1-5 BCABB 6-10 AAACC
二、11. is 12. changing 13. where 14. Although 15. suddenly
16. goes 17. received 18. quickly 19. of 20. spreading
三、21-25 BCBAC 26-30 ACACB
四、31- 35 ABDAC 36-40 AABDA
五、41. to do 42.explained 43.feathers 44.knives 45.to see 46.frightened
47. landing 48.written 49. to talk 50.speaking www.21-cn-jy.com