Although medical science __________ control over several diseases,what worries us is that some of them are returning.

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• 1They____on the program for almost one month before l was arranged to help them. Now, we____on it as no result has come out.

  A.had been working: are still working

  B.had worked; were still working

  C.have been working; have worked

  D.have worked; are still working

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• 2Allen has decided that he will be an engineer by the time he ________ twenty.

  A.had been

  B.is going to be

  C.will be

  D.is

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• 3—Lucy, tell me about your trip to the beach. —Awful! There ________ too many holidaymakers.

  A.had been

  B.were

  C.would be

  D.have been

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• 4Jessica ought to stop work.She has a headache because she _______ too long.

  A.read

  B.is reading

  C.had read

  D.has been reading

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• 5．The sweater_______ easily; isn't it suitable for a person as lazy as you?

  A.is washed

  B.was washed

  C.washes

  D.has washed

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• 6Ever since the patients moved to the new hospital last year, they __________ better medical treatment.

  A.have received

  B.had received

  C.will receive

  D.received

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• 7–Have you handed in your schoolwork yet? --Yes, I have. I guess it ________ now.

  A.has graded

  B.is graded

  C.is being graded

  D.is grading

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• 8Tony is a lawyer now, but he ________ in a delivery company for six years.

  A.has served

  B.had served

  C.was serving

  D.served

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• 9—Do you love teaching, Miss He? —I fell in love with teaching in 2000. I ________ for twelve years by this summer.

  A.will teach

  B.would have taught

  C.has been teaching

  D.will have been teaching

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• 10The novel written by the author ________ best, but five years ago no one could have imagined how great a role he ________ in the literary world.

  A.sells; was to play

  B.was selling; was playing

  C.sold; had played

  D.is sold; is playing

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