______environmental damage is done，it takes many years for the ecosystem to recover.

试卷相关题目

• 1Tom was about to  close the window _____ his attention  was caught by a bird.           

  A.when

  B.if

  C.and

  D.till

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• 2He was about to tell me the secret ______someone patted me on the shoulder.     

  A.as

  B.until

  C.while

  D.when

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• 3Some are reading magazines,______ others are playing cards.

  A.or

  B.for

  C.so

  D.while

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• 4Turn the heat down ________ your cake will burn.

  A.and

  B.or

  C.so

  D.but

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• 5I want to buy the jacket,_______ I have not enough money with me.  

  A.but

  B.so

  C.or

  D.for

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• 6He came all the way to China for learning it better ______ for making money.   

  A.other than

  B.more than

  C.better than

  D.rather than

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• 7She was very hardworking ________he was very lazy. As a result,she passed the examination,but he failed.

  A.when

  B.since

  C.while

  D.as

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• 8—Someone wants you on the phone.—________ nobody knows I am here.

  A.Although

  B.And

  C.But

  D.So

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• 9Help others whenever you can _______ you will make the world a nicer place to live in.

  A.and

  B.or

  C.unless

  D.but

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• 10Mr Smith ________ his wife and daughter ________ going to the Great Wall.

  A.as well as; is

  B.as well; are

  C.as well as; are

  D.as well; is

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