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1、Unit 4 Our World综合能力演练I. 单项选择1. Ann used the computer for shopping, _?A. used sheB. usednt sheC. did sheD. didnt she2. You must _ the traffic lights when you cross the road.A. pay attention toB. pay attentions toC. pay attention onD. pay attentions on3. How many students are there in your school?_ s
2、tudents, I think.A. Thousand ofB. Three thousandsC. Three thousandD. Three thousands of4. Why do you like living in the countryside?Because theres _ noise and _ cars there.A. less; fewerB. fewer; lessC. less; lessD. fewer; fewer5. Dont make me _ the clothes. Im too tired!A. washingB. to washC. washD
3、. washed6. I think dumplings are _ more delicious than noodles.I dont agree with you.A. muchB. veryC. tooD.so7. My aunt goes to climb Mount Gu every Sunday.Oh? But she _ hate climbing mountains.A. used toB. use toC. uses toD.is used to8. Your classroom is so dirty. Everyone should keep it _.A. dryB.
4、 openC. quietD. clean9. Wow, your school is great!It is _ school in the city.A. much more beautifulB. much beautiful C. the most beautifulD. beautiful10. Blue whales are the largest and heaviest animals in the world, but they _ the smallest sea animals.A. feed inB. live inC. feed onD. fed on真题链接1. I
5、 was looking for a birthday gift for my mother, but I couldnt find _ suitable.A. something B. anything C. nothing D. everything2. Excuse me, may I keep the book a little longer? Sorry. You _ return it today.A. mustB. mustntC. canD. cant3. _ will the fog and haze last? Ive no idea. There is no sign o
6、f an end.A. How soonB. How far C. How longD. How often II. 完形填空We live in the“computer age”. Long ago computers couldnt do 1 .They were very big and 2 .They used a lot of energy(能量). Only a few people were 3 in them. Today computers are 4 and cheaper. They can 5 difficult work.Computers have 6 impor
7、tant for many reasons. They work faster and make fewer mistakes. They can remember much information. A computer can work out millions of problems 7 a few seconds. A person might need years 8 so many problems.People now use computers in nearly every kind of work. Computers are very useful and the 9 o
8、f computers is growing. More computers mean more jobs for people, 10 people need to run(操作) and mend them.Would you like to learn how to run a computer?1. A. many B. muchC. a lot ofD. lots of2. A. cheap B. cheaperC. expensiveD. more expensive3. A. interest B. interestingC. interestsD. interested4. A
9、. small B. smallerC. bigD. bigger5. A. doB. makeC. turnD. eat6. A. turnB. gotC. isD. become7. A. withB.inC. forD.at8. A. works out B. workC.to work outD.to work9. A. useB. usefulC. uselessD. to use10. A. whyB. howC. becauseD. whatIII. 阅读理解ADo you know why different animals or pests (害虫) have their s
10、pecial colors？Colors on them seem to be used mainly (主要地) to protect themselves.Some birds like eating locusts (蝗虫), but birds cannot catch them easily. Why? Because locusts change their colors according to the colors of crops (庄稼). When crops are green, locusts look green. But as the harvest time c
11、omes, locusts change to the same brown color as crops have. Some other pests with different colors from plants are easily found and eaten by others, so they have to hide (隐藏) themselves and appear (出现) only at night.If you study animal life, youll find the main use of coloring is to protect themselv
12、es. Bears, lions and other animals move quietly through forests. They cannot be easily seen by hunters (猎人). This is because they have colors much like the trees.A kind of fish in the sea can send out a kind of very black liquid (液体) when it faces danger. While the liquid spreads out, its enemies (敌
13、人) cannot find it, so it can escape (逃跑) at once. That is why it can live long, though it is not strong at all.1. From the passage we learn that locusts _.A. are small animalsB. are easily found by birdsC. are dangerous to their enemiesD. change their colors to protect themselves2. How can pests wit
14、h different colors from plants keep out of danger?A. They run away quickly.B. They have the colors much like their enemies.C. They hide themselves by day and appear at night.D. They have to move quietly.3. Bears and lions can keep safe because _.A. they have the colors much like the treesB. they mov
15、e quietlyC. they like brown and grey colorsD. they live in forests4. Why can the kind of fish live long?A. Because it is very big and strong.B. Because it can send out a kind of very black liquid to help it escape from its enemies.C. Because it can send out a kind of liquid to kill its enemies.D. Because it swims faster than any other fish.5.Which i
