To make himself________, the old professor had to______his voice.

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• 1The experiment shows that proper amounts of physical exercise, if _______ regularly, can make a difference to our health.

  A.being carried out

  B.carrying out

  C.carried out

  D.to carry out

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• 2Contrast may make something appear more beautiful than it is when________alone.

  A.seen

  B.is seen

  C.to be seen

  D.having been seen

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• 3I played table tennis for half an hour, which made me_________.

  A.relax

  B.relaxing

  C.relaxation

  D.relaxed

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• 4The man _____ of shooting six children was caught by the police, the Xinhua News, reported on Friday.   

  A.being suspected

  B.suspecting

  C.suspected

  D.to be suspected

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• 5Carmen, _____ on a literary masterpiece, is a well-known classical opera in Europe.   

  A.base

  B.to base

  C.basing

  D.based

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• 6________ by the advances in technology, many farmers have set up wind farms on their land.

  A.Being encouraged

  B.Encouraging

  C.Encouraged

  D.Having encouraged

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• 7In the dream Peter saw himself ________ by a fierce wolf, and he woke up with a start.

  A.chased

  B.to be chased

  C.be chased

  D.having been chased

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• 8The house is leaking. When will you get it ________?

  A.repair

  B.repairing

  C.repaired

  D.to repair

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• 9When I turned to the person ________ next to me, I recognized that he was my schoolmate.

  A.seating

  B.being sat

  C.sit

  D.seated

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• 10You should understand the traffic rule by now. You've had it ________ often enough.     

  A.explaining

  B.to explain

  C.explain

  D.explained

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