Jack could have avoided that terrible car accident, but he ________ careful enough.

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• 1—Allan looks tired out. —Sure. He ______  in the gym for two hours.

  A.works out

  B.had worked out

  C.has been working out

  D.was working out

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• 2If you _____ him yesterday, you _____ what to do now.

  A.asked … would know

  B.had asked … would have known

  C.asked him … know

  D.had asked … would know

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• 3It's high time that we _____ measures to stop selling polluted vegetables.

  A.must take

  B.take

  C.took

  D.will take

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• 4---- What's that noise?  ---- Oh, I forgot to tell you. The new machine ______.

  A.was tested

  B.will be tested

  C.is being tested

  D.has been tested

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• 5It ____________ long before we ____________ the result of the experiment．

  A.will not be；will know

  B.is；will know

  C.will not be；know

  D.is; know

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• 6------ Kate and Lucy are twins. ------ Oh, I ______ why they looked so alike.

  A.wonder

  B.have wondered

  C.was wondering

  D.had wondered

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• 7I didn't know Jane ________in Paris. How long ______here?

  A.is; does she live

  B.was; has she been

  C.has been; is she

  D.were; has she come

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• 8---Did you ask Sophia for help? ---I ______ need to – I managed perfectly well on my own.

  A.wouldn't

  B.don't

  C.didn't

  D.won't

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• 9—Has your son come back from abroad for the winter vacation? —Yes. But he stayed at home for only a week. Now he ____________back to college.

  A.went

  B.has gone

  C.was going

  D.will go

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• 10A trend_______ that 3D films will become more popular ever since the film Avatar hit the market.

  A.has arisen

  B.arose

  C.is arising

  D.will arise

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