A similar wrong idea is that fish and ice cream when ________ at the same time form a poisonous combination(有毒物质).

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• 1She sat there alone, with tears ________ down her cheeks.

  A.stream

  B.streamed

  C.streaming

  D.to stream

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• 2When I went in, they were _________ in a heated discussion．

  A.absorb

  B.absorbed

  C.absorbing

  D.being absorbed

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• 3Different opinions about where to build the chemical work arise at the meeting _________ now．

  A.held

  B.being held

  C.to be held

  D.holding

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• 4_________ dinner, she sat at the table，__________ for the children to return．

  A.Finished preparing；waiting

  B.Having finished preparing；waiting

  C.Finishing to prepare；and waited

  D.Having finished to prepare；and waiting

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• 5We got home to find the whole house ______ upside down. Thieves obviously had broken in .

  A.turned

  B.turning

  C.being turned

  D.to have turned

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• 6Before ________, the machine must be checked.

  A.using

  B.being used

  C.to be used

  D.to being used

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• 7Did he want this matter ________?

  A.to be dealt

  B.to be dealt with

  C.to deal with

  D.to deal

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• 8Some people prefer ________ others play chess to ________ chess themselves.

  A.watching; play

  B.watch; play

  C.to watch; playing

  D.watching; playing

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• 9________ between the floors, the lift couldn't work．

  A.Having trapped

  B.To trap

  C.Trapped

  D.Trapping

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• 10There was a _______ look on her face so he got______．

  A.puzzled; puzzled

  B.puzzling; puzzling

  C.puzzled; puzzled

  D.puzzling; puzzled

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