Some insects_____ the colour of their surroundings (环境) to protect themselves.

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• 1Once a computer is put into water, the system _______ and cannot repair itself.

  A.breaks down

  B.breaks through

  C.breaks out

  D.breaks up

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• 2As the crowd rushed towards the gate, several people got______.

  A.knocking down

  B.knocked off

  C.knocking on

  D.knocked over

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• 3He acknowledged _______the book from my bag.

  A.to steal

  B.stealing

  C.steal

  D.stolen

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• 4We have already said a good deal about the various problems _______ the war.

  A.trying out

  B.dating back to

  C.appealing to

  D.relating to

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• 5With the environment worsening, the government ______ people for more environment protection．

  A.reacts to

  B.appeals to

  C.refers to

  D.leads to

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• 6You can walk one mile or two to the crossroads where the school bus will ______ you ______.   

  A.bring; up

  B.call; up

  C.pick; up

  D.keep; up

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• 7With a large amount of work _______, the chief manager couldn't spare time for a holiday.

  A.remained to be done

  B.remaining to be done

  C.remained being done

  D.remaining to do

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• 8It's obvious that the Beijing Olympic Games _______ a great success．

  A.kept

  B.showed

  C.proved

  D.remained

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• 9By the time the tornado ended, more than 2,000 people _____.

  A.has injured

  B.has been injured

  C.had injured

  D.had been injured

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• 10We will throw a party to _____ our parents' golden wedding.

  A.congratulate

  B.celebrate

  C.win

  D.defend

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