______ around the lab, the visitors were taken to the playground.

试卷相关题目

• 1—Did the book give the information you needed? —Yes. But _____ it, I had to read the entire book

  A.to find

  B.find

  C.to finding

  D.finding

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• 2You cannot accept an opinion ______ to you unless it is based on facts.

  A.offering

  B.to offer

  C.having offered

  D.offered

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• 3So difficult __________ that no one could _________ a good solution to it

  A.was the problem; come up with

  B.the problem was; come up with

  C.the problem was; put up with

  D.was the problem; put up with

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• 4The airport ______ next year will help promote tourism in this are

  A.A.being completed

  B.to be completed

  C.completed

  D.having been completed

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• 5The professor devoted all his life __________ the treatment of AIDS．

  A.to research

  B.in researching

  C.to researching

  D.at researching

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