Although scientists have studied the Earth for many centuries, theories about its origin（  ）。

试卷相关题目

• 1The man was sent to prison for six months, because he（  ）guilty of theft。

  A.found

  B.is found

  C.has been found

  D.had been found

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• 2I can not make oat the instruction on the bottle because it（  ）。

  A.is printed in smallletters

  B.was printed insmall letters

  C.has been printed in small letters

  D.is being printed in small letters

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• 3The experiment cannot（  ）because the equipment（  ）。

  A.be carried cut, is damaged

  B.have been carried out, are damaged

  C.carry out , damaged

  D.be carried out, has damaged

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• 4The building of a new airport（  ）and it（  ）soon。

  A.was agreed on，wasto start

  B.had agreed on, would to start

  C.has been agreed on, is goingto start

  D.agreed, has been started.

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• 5May I have a look at your picture? Sorry, but it（  ）in the drawer。

  A.waslocked up

  B.has been locked up

  C.had been locked up

  D.locked up

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• 6The expressway on which we drive to work（  ）on Monday。

  A.isalways crowded

  B.are always crowded

  C.have been always crowded

  D.is being crowded

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