That the brain, once____oxygen, dies has been proved.

试卷相关题目

• 1Electrical resistance is a common property of all materials, ____

  A.only differs in degree

  B.only in degree it differs

  C.differing only in degree

  D.and differing in degree only

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• 2I was overjoyed at the news of my hometown____so much progress.

  A.to make

  B.to have made

  C.made

  D.having made

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• 3Some people are sitting on the grass; others are strolling along the lake side,_____ .

  A.chatting and to laugh

  B.to chat and to laugh

  C.chatting and laughing

  D.chatting and laughed

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• 4The decision____,what is to be done now is how to carry it out .

  A.been made

  B.has been made

  C.having been made

  D.having been making

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• 5Television has become a major instrument of communication,____us to see as well as to hear all kinds of programmes.

  A.to permit

  B.permitted

  C.being permitting

  D.permitting

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• 6The Red Cross____help for refugees, over two million dollars have been raised.

  A.appeals for

  B.appeals to

  C.has been appealing for

  D.appealing for

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• 7____, the mountain looks like an elephant .

  A.Having seen from a distance

  B.Having been seen from a distance

  C.Seeing from a distance

  D.Seen from a distance

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• 8The students are forbidden, unless they had special passes,____after 11 p. m. .

  A.staying out

  B.from staying out

  C.stay out

  D.to stay out

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• 9She is 40, but I think she could____25 without much trouble.

  A.be passed for

  B.have been passed for

  C.pass for

  D.be passing for

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• 10She had said little so far, responding only briefly when____

  A.speaking

  B.spoken to

  C.spoken

  D.speaking to

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