It is ________ that light travels faster than sound．

试卷相关题目

• 1Green products are becoming more and more popular because they are environmentally ________．

  A.friendly

  B.transparent

  C.best-selling

  D.widespread

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• 2We are not surprised at all, because it is very ________ among young people．

  A.usual

  B.popular

  C.common

  D.ordinary

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• 3It is ________ to find your lessons difficult sometimes, everybody does so．

  A.necessary

  B.always

  C.often

  D.normal

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• 4The strong and tall man is as ________ as milk．

  A.mild

  B.handsome

  C.brave

  D.powerful

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• 5The change was so ________ that we hardly noticed it．

  A.actual

  B.actually

  C.gradual

  D.gradually

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• 6To my amazement, you should trade the ________ ring for a false one!

  A.valueless

  B.priceless

  C.dear

  D.expensive

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• 7By the end of the year, the ________ money collected had come to over 92 million dollars, all of which were sent to Africa．

  A.whole

  B.total

  C.all

  D.complete

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• 8John is a(n)_______ boy．Whenever I see him, he is working．

  A.cautious

  B.energetic

  C.familiar

  D.outgoing

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• 9Mr．Good has too ________ a nature to get angry, even if he has a good cause．

  A.fresh

  B.lively

  C.strong

  D.mild

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• 10Students should be _______ in class．Only listening without taking part in the activities is not good for one's study．

  A.passive

  B.active

  C.curious

  D.lazy<>AB>

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