Scientists believe that the first inhabitants of the America arrived by crossing the land bridge that connected Siberia and ________ more than 10,000 years ago.

试卷相关题目

• 1The reason he has made such great progress is ________ he has never wasted his time.

  A.because

  B.why

  C.that

  D.what

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• 2That is ________ the earth pulls all bodies on it.

  A.why

  B.where

  C.when

  D.that

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• 3________ was regarded as impossible has now become a reality.

  A.What

  B.It

  C.That

  D.Whoever

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• 4The scientist lived in ________ is now Luoyang.

  A.where

  B.which

  C.what

  D.that

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• 5________ is still unknown.

  A.When and where this took place

  B.When and where did this take place

  C.It was when and where that took place

  D.This took place when and where

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• 6The mother told the boy ________ the sun ________ the east.

  A.if; rise from

  B.that: rose in

  C.whether; rose from

  D.that; rises in

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• 7It is good news ________ they will arrive in a few days.

  A.which

  B.what

  C.that

  D.how

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• 8The reason why he was late for meeting is ________he had to take his mother to the hospital.

  A.because

  B.that

  C.as

  D.for

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• 9You must promise that on no condition ________ my secret.

  A.will you let out

  B.you will let out

  C.you are to let out

  D.you would let out

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• 10Air pollution is really a big problem here, but nobody knows ________ to do about it.

  A.if

  B.how

  C.what

  D.whether

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