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新概念英语4第2课课后习题及答案

2016-10-06 13:18:00来源：网络

　　为了方便同学们自学新概念，新东方在线为大家整理了新概念英语4第2课课后习题及答案，希望以下内容能够为大家的新概念英语学习有所帮助~

　　新概念英语第4册课后习题及答案大全>>立即查看

　　新概念英语第4册课后习题答案:

　　Unit 2 BCBDC ACAAD BC

　　新概念英语第4册第2课课后习题:

　　Multiple choice questions 多项选择题

　　Choose the correct answers to the followingquestions.

　　Comprehension 理解

　　1 Spiders are our friends because they ____.

　　a.are beneficial insects

　　b.destroy insects without hurting us in any way

　　c.protect insect-eating animals

　　d.include some of the greatest enemies of the human race

　　2 Birds and beasts ____.

　　a.eat as many insects as spiders

　　b.eat more insects than spiders

　　c.can't compare with spiders as destroyers of insects

　　d.destroy a larger fraction of insects than spiders

　　3 If spiders were insects, they would ____.

　　a.have eight legs

　　b.have six legs

　　c.be able to fly

　　d.not destroy their own kind

　　4 Spiders are active in killing insects ____.

　　a.all the time

　　b.for most of the year

　　c.in the summer months

　　d.for a minimum of six months of each year

　　Structure 句型

　　5 It would ____ impossible for us to live in this world if insects had no enemies.(11.2-3)

　　a.make it

　　b.stay

　　c.be

　　d.have it

　　6 We owe ____ to the birds and beast who eat insects.(1.4)

　　a.a great deal

　　b.a lot of

　　c.a great many

　　d.much of

　　7 How many spiders are involved ____ this work on our behalf?(1.9)

　　a.at

　　b.for

　　c.in

　　d.to

　　8 There are many different ____ spiders.(1.11)

　　a.sorts of

　　b.kind of

　　c.type of

　　d.kinds

　　Vocabulary 词汇

　　9 Spiders ____ insects.(11.3-4)

　　a.defend us from

　　b.guard

　　c.protect

　　d.insure us against

　　10 You can see at a glance that spiders are not ____ insects.(1.7)

　　a.similar

　　b.like to

　　c.as

　　d.the same as

　　11 Spiders are creatures with large ____.(1.13)

　　a.hunger

　　b.appetites

　　c.desires

　　d.eating

　　12 Spiders like to eat more than ____ a day.(1.13)

　　a.three

　　b.three time

　　c.three times

　　d.threes

　　Comprehension 理解

　　Give short answers to these questions in your ownwords as far as possible.Use one complete sentencefor each answer.

　　1 Why have we reason to be grateful to insect-eating animals?

　　2 How can we tell the difference between a spiderand an insect?

　　3 What do you understand by the statement‘Oneauthority on spiders made a census of the spiders in a grass field…’?(11.9-10)

　　Vocabulary 词汇

　　Refer to the text to see how the following words have been used, then write sentences of yourown using these words: destroy (1.1); devour (1.3); fraction (1.5); belongings (1.6);estimated (1.10).

　　Sentence structure 句子结构

　　A Combine the following sentences to make one complex statement out of each group.Makeany changes you think necessary, but do not alter the sense of the original.Do not refer tothe passage until you have finished the exercise:

　　1 Moreover, spiders are unlike some of the other insect eaters.They never do the least harm tous or our belongings.(11.5-6)

　　2 Spiders are not insects.They are not even nearly related to them.Many people think theyare.(1.7)

　　3 One can tell the difference almost at a glance.A spider has eight legs.An insect never hasmore than six.(11.7-8)

　　4 How many do they kill? It is impossible to make more than the wildest guess at this.Theyare hungry creatures.

　　They are not content with only three meals a day.(11.12-13)

　　B Complete the following sentences in any way you wish.Then compare what you have writtenwith the sentences in the passage:

　　1 Why, you may wonder, should spiders be our friends? Because ____.(11.1-2)

　　2 We owe a lot to birds and beasts who ____.(11.4-5)

　　3 One authority on spiders ____.(11.9-10)

　　4 It has been estimated that ____.(11.13-15)

　　C Write three sentences saying why you like or dislike spiders.

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