When you are using gas, ________ that one of the windows is open.

试卷相关题目

• 1All the children thought the animal could ________.

  A.keep alive

  B.be kept alive

  C.keep living

  D.That hopes

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• 2The book, ________ for beginners, is popular with students.

  A.designs

  B.designing

  C.designed

  D.to design

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• 3When I hurried to the station, there happened ______ no bus at that time.

  A.to have

  B.to be

  C.having

  D.being

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• 4The bark of some species of oak trees yields substance used in ____ leather.

  A.treating

  B.to treat

  C.its treatment

  D.it treats

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• 5Another advertisement has been stopped________ on TV for its ________ text.

  A.from appearing; badly written

  B.from being broadcast; badly written

  C.to appear; bad written

  D.appearing; bad writing

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• 6Aunt Liu is busy ________ breakfast for us.

  A.preparing

  B.preparing for

  C.prepared

  D.prepared for

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• 7It seemed ________ he knew nothing about it.

  A.as though

  B.even if

  C.even though

  D.like

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• 8The proposal had been put forward, and then arose the question ________ we were to get the proofs ________.

  A.what ;needed

  B.where ;to need

  C.what ;to need

  D.where ;needed

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• 9When he came to himself, he found himself ________ in hospital and ________ by a group of doctors and nurses.

  A.lay; surrounded

  B.lying; surrounded

  C.laid; surrounding

  D.lying; surrounding

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• 10________, he works very hard.

  A.Because a model worker

  B.Since a model worker

  C.As a model worker

  D.To be a model worker

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