Only when all the fish in the lake died _____ how serious the pollution was.

试卷相关题目

• 1I had no idea when and where _____.

  A.it happened

  B.does it happen

  C.it had happened

  D.had it happened

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• 2— Have you read book called Waiting for Anya? — Who _____ it?

  A.writes

  B.has written

  C.wrote

  D.had written

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• 3She _____  her hairstyle in her hometown before she came to Chongqing for a better job.

  A.would change

  B.has changed

  C.changed

  D.was changing

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• 4All the students _____ by 10:30, but the speaker _____ until 11:00.

  A.return, has turn up

  B.has returned, turned up

  C.returned, turn up

  D.had returned, didn't turn up

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• 5I would have called you up for help had it been possible, but I ____ your phone number then.

  A.hadn't had

  B.didn't have

  C.shouldn't have

  D.couldn't have

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• 6— Were you in the library when Jack arrived there? — Yes, but I ____ soon afterwards.

  A.had left

  B.left

  C.would leave

  D.will leave

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• 7—We could have asked Miss Keller for help. She is always kind-hearted. —Yes. A whole day ____.

  A.will waste

  B.had wasted

  C.was wasted

  D.would be wasted

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• 8Only then _____ how much damage had been caused.

  A.she realized

  B.she had realized

  C.had she realized

  D.did she realize

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• 9— Have you known Dr. Jackson for a long time? — Yes, since she _____ the Chinese Society.

  A.has joined

  B.joins

  C.had joined

  D.joined

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• 10I failed in the final examination last term and only then _____ the importance of studies.

  A.I realized

  B.I had realized

  C.had I realized

  D.did I realize

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