-That's the third time he's won the award in this field.-Yes. He ________ his maximum potential in the past decade.

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• 1—Tony, come down and help me with the heavy box!   —Come on! I _____ all day long. Get Peter to do that!  

  A.work

  B.had been working

  C.had worked

  D.have been working

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• 2Look at the sweat on her face. She________the house since she got up this morning.

  A.is cleaning

  B.has been cleaned

  C.was cleaning

  D.has been cleaning

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• 3Tom ________ in the library every night over the last three months.

  A.works

  B.worked

  C.has been working

  D.had been working

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• 4—I have got a headache. —No wonder. You ________ in front of that computer too long.

  A.work

  B.are working

  C.worked

  D.have been working

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• 5— Hi! John, would you like to play football with us?   — Oh,I can't. I ___ my lesson all the morning and still need half an hour.

  A.am reviewing

  B.have been reviewing

  C.have reviewed

  D.reviewed

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• 6Excuse me,Marcia,a reporter from Vanity Fair_________all day. Could you speak to her now?       

  A.phones

  B.has phoned

  C.has been phoning

  D.phoned

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• 7The development of China's economy ________ since the 80s of last century.    

  A.has been accelerating

  B.had accelerated

  C.is accelerating

  D.accelerated

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• 8Excuse me, Marcia, a reporter from Vanity Fair ____ all day.  Could you speak to her now?    

  A.phones

  B.has phoned

  C.has been phoning

  D.phoned

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• 9By the time you arrive in London, we   in Europe for two weeks.

  A.shall stay

  B.have stayed

  C.will have stayed

  D.have been staying

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• 10She ought to stop reading；she has a headache because she________for too long.

  A.has been reading

  B.had read

  C.is reading

  D.read

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