It still puzzles today's scientists ______ some mammals produce their young ______ others lay eggs to produce their offspring( 后代

试卷相关题目

• 1_____adult as he is , he can't stand _____ more embarrassing situation than this one.

  A.An; the

  B./; a

  C.An; a

  D./; the

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• 2The accidents of coal mines are believed ______ hundreds of deaths in China so far.

  A.to result in

  B.to have resulted in

  C.resulting in

  D.being resulted in

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• 3Judging from his ______ look, I can say Mr. Li is ______ at our arrival at this time.

  A.annoying ;annoyed

  B.annoying ;annoying

  C.annoyed ;annoyed

  D.annoyed ;annoying

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• 4_______tomorrow, we will still join hands to help the poor in the outside.

  A.However the weather is like

  B.However is the weather like

  C.Whatever is the weather like

  D.Whatever the weather is like

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• 5Then I have learned there are a lot of troubles in our lives, but the problem is _______ they control you or you control them.

  A.why

  B.whether

  C.that

  D.what

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• 6The Project Hope _____ to help the poor children to go to school in China _____ to be a success.

  A.tried; turns over

  B.hoped; turns in

  C.intended; turns out

  D.wished; turns up

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• 7You ______ park  here! It's an  emergency  exit.

  A.wouldn't

  B.needn't

  C.couldn't

  D.mustn't

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• 8Today ,we will begin ______ we stopped yesterday  so that no point will be left out.

  A.when

  B.where

  C.how

  D.what

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