Birds' singing is sometimes a warning to other birds ________ away.

试卷相关题目

• 1With so much work _______, we had to sit up through the night.

  A.done

  B.doing

  C.to do

  D.being done

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• 2If there's a lot of work _____, I'm happy to just keep on until it is finished.

  A.to do

  B.to be doing

  C.done

  D.doing

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• 3The purpose of new technologies is to make life easier, -_______ it more difficult.

  A.not make

  B.not to make

  C.not making

  D.don't make

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• 4He left his homeland, ______ never ______ back again.

  A.determined; to come

  B.being determined; to come

  C.determined; coming

  D.determining; coming

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• 5_____ the project as planned, we'll have to work two more hours a day.

  A.Completing

  B.Complete

  C.Completed

  D.To complete

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• 6The difference in thickness and weight from the earlier version makes the iPad 2 more comfortable _____.

  A.held

  B.holding

  C.be held

  D.to hold

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