（2006山东﹚Although the causes of cancer________, we do not yet have any practical way to prevent it.

试卷相关题目

• 1（2006重庆﹚I ________in London for many years, but I’ve never regretted my final decision to move back to Chin

  A.A.lived

  B.was living

  C.have lived

  D.had lived

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• 2（2006重庆﹚I have to go to work by taxi because my car________at the garage.

  A.will be repaired 

  B.is repaired

  C.is being repaired

  D.has been repaired

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• 3（2006湖北﹚I won’t tell the student the answer to the math problem until he________on it for more than an hour.

  A.has been working

  B.will have worked

  C.will have been working

  D.had worked

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• 4（2006湖南﹚In a room above the store, where a party________, some workers were busily setting the table.

  A.was to be held

  B.has been held

  C.will be held

  D.is being held

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• 5（2006福建﹚Ladies and gentlemen, please fasten your seat belts.The plane________.

  A.takes off

  B.is taking off

  C.has taken off

  D.took off

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• 6（2006北京﹚  — Your job________open for your return.— Thanks.

  A.will be kept

  B.will keep

  C.had kept

  D.had been kept

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• 7（2006北京﹚— Where did you put the keys of the car、— Oh, I    ________I put them on the chair because the phone rang as I________in.

  A.remembered;come

  B.remembered;was coming

  C.remember;come

  D.remember;was coming

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