People begin to know that most environmental problems exist because necessary measures for preventing them _____ taken in the past.

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• 1— Do you think he can get the first prize for jumping?  —Impossible now. He    to do so, but he has just hurt his leg.    

  A.would expect

  B.was expected

  C.has expected

  D.is expected

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• 2Experiments of this kind ________ in both the U. S. and Europe well before the Second World War.

  A.have conducted

  B.have been conducted

  C.had conducted

  D.had been conducted

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• 3The computer looks old, but it ______ just half a year ago.

  A.has been bought

  B.will be bought

  C.is bought

  D.was bought

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• 4The song reminded me of those days when I ____ care of by my grandparents in my home village.

  A.was taken

  B.took

  C.had been taken

  D.had taken

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• 5At the end of the meeting,it was announced that an agreement    .

  A.has been reached

  B.had been reached

  C.has reached

  D.had reached

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• 6It was the third time that he    of the changes of the meeting.

  A.had informed

  B.had been informed

  C.has informed

  D.has been informed

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• 7He ____ for dangerous driving.  

  A.arrested

  B.was arresting

  C.had arrested

  D.was arrested

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• 8The flowers were so lovely that they _____ in no time.

  A.sold

  B.had been sold

  C.were sold

  D.would sell

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• 9After getting lost in a storm, a member of the navy team ________ four days later.

  A.rescued

  B.was rescued

  C.has rescued

  D.had been rescued

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• 10When one end of the chopstick is in the water, it looks as if it____________.     

  A.is broken off

  B.were broken off

  C.is broken up

  D.was broken off

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