As is known to all , theory is based on practice and ______ serves practice.

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• 1It's important for the figures ______ regularly.

  A.to be updated

  B.to have been updated

  C.to update

  D.to have updated

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• 2It will take _____ time to finish the project.

  A.one and a half months'

  B.a month and a half

  C.one and a half month's

  D.a month and half's

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• 3Physics is difficult ____

  A.to be learned

  B.to learn

  C.to be learning

  D.to be learn

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• 4The new school has been completed. It _____ very beautiful.

  A.is looked

  B.looked

  C.has looked

  D.looks

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• 5That is the only way we can imagine________ the overuse of water in students' bathrooms.

  A.reducing

  B.to reduce

  C.reduced

  D.reduce

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• 6______that she's by law old enough to get married, I don't see how you can stop her.

  A.Having seen

  B.To see

  C.Seeing

  D.Seen

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• 7Kids are not allowed to leave kindergartens ______ their parents come to pick them up.

  A.unless

  B.since

  C.although

  D.because

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• 8Mr. Black ________ Shanghai in a few days. Do you know when the earliest plane _______ on Sunday?

  A.is leaving ,takes off

  B.leaves ,takes off

  C.is leaving ,is taking off

  D.leaves ,is taking off

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• 9Lincoln had very little free time ______ he could spend studying then.

  A.when

  B.in which

  C.at which

  D.which

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• 10I had never expected _____ such a big audience there.

  A.it to be

  B.there being

  C.there to be

  D.there to have

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