Some scientists think there are _______ 2，000 million flashes of lightning per year.

试卷相关题目

• 1I shouldn't have accepted the man's present, but I found it difficult to turn down his ______.

  A.offer

  B.request

  C.suggestion

  D.plan

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• 2Although the old man is in his sixties, ______ he walks fairly fast.

  A.but

  B.yet

  C.therefore

  D.however

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• 3The problem ________ this material can be used in our factory has been solved.

  A.that

  B.what

  C.whether

  D.why

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• 4______ Japan's nuclear crisis (核危机) will be solved in 2011 is not known yet.

  A.That

  B.If

  C.Whether

  D.What

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• 5People have realized that they should go on _____ balanced diet and do _____ exercise every day.

  A.a; /

  B.the; an

  C.the; the

  D./; an

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• 6All the task __________ ahead of time, so they decided to go on holiday for a week

  A.having finished

  B.had finished

  C.having been finished

  D.had been finished

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• 7By this time next year we _________ from the college.

  A.will be graduating

  B.should be graduating

  C.will have graduated

  D.is graduating

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