---Why do you keep looking back? ---I have a feeling that we _______.

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• 1—Those scientists invented a robot to care for kids! —It's not surprising．They ________ wonders all the time．

  A.worked

  B.were working

  C.work

  D.have been working

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• 2If my father ______here now,  he _____ tell me what to do. But he left home just one hour ago.

  A.were, would

  B.were, will

  C.is , would

  D.is, will

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• 3She has been given three free tickets for tomorrow's concert and she ______ there with two of her best friends.

  A.has gone

  B.is going

  C.has been

  D.went

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• 4．The moment I got home, I found I _______ my jacket on the playground.

  A.had left

  B.left

  C.have left

  D.was leaving

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• 5Our monitor talks about Mars as if he ______ a scientist.

  A.is

  B.were

  C.be

  D.had been

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• 6—Why did you leave the water running in the sink? —My goodness! I guess I ____ to turn off the tap．

  A.forgot

  B.have forgotten

  C.forget

  D.had forgottten

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• 7It is said that a new robot ______ by him in a few days.

  A.designed

  B.has been designed

  C.will be designed

  D.will have been designed

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• 8_________ where the sound lab _________?

  A.Has it decided; will built

  B.Is it decided; it built

  C.Has it been decided; will be built

  D.Will it be decided; will be built

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• 9．The news came as no surprise to me. I ______ for some time that I would fail in the exam.

  A.had known

  B.knew

  C.have known

  D.know

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• 10The witness who appeared in court ____ to speak out the truth instead of covering it up．

  A.encouraged

  B.has been encouraging

  C.was encouraging

  D.had been encouraged

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