You need some facts _____ to base your theory.

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• 1China's hurdler Liu Xiang was disqualified due to false start in the 60-metre event, _____ his rival Dayron Robles of Cuba an easy win of 7.66 seconds.

  A.giving

  B.given

  C.to give

  D.gave

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• 2Once _____ , the machine will keep running.

  A.start

  B.started

  C.to start

  D.starting

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• 3The young writer's first book ______next month is based on a real person and event.

  A.published

  B.publishing

  C.to be published

  D.to publish

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• 4The environmentalist said: “Making money is blameless, but I can't ________ to unnecessary killing of wild animals for that purpose.”

  A.subscribe

  B.tend

  C.oppose

  D.suggest

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• 5The experiment shows that proper amounts of exercise, if ______ regularly, can improve our health.

  A.being carried out

  B.carrying out

  C.to carry out

  D.carried out

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• 6He is used to ______ to his office in spite of bad weather.

  A.to walk

  B.walking

  C.walked

  D.has walked

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• 7Every year about one million tourists visit Stonehenge, which is believed __________before the Pyramids, about 4,000 years ago.

  A.to build

  B.to have built

  C.to be built

  D.to have been built

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• 8The survey ______ in our school last month shows that about three percent of the students are addicted to the Internet games.

  A.conducted

  B.was conducted

  C.conducting

  D.to be conducted

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• 9___ from space, the earth with water ___70％ of its surface looks like a 'blue blanket'.

  A.Seen ;covered

  B.Being seen; covers

  C.Seeing; covering

  D.Seen; covering

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• 10---- What do you think made Tom so upset? ---- ______her new bicycle.

  A.Because of

  B.Lost

  C.As she lost

  D.Losing

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