It may be 5 or 10 years __________ it is possible for people to find a space station on the moon.

试卷相关题目

• 1_______Joe  saw the film ‘ET' directed by Steven Spielberg ,he made up his mind to turn ____ director ,too

  A.For the very first time; a

  B.The very first time; a

  C.On the very first time; /

  D.The very first time; /

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• 2Don't turn off the computer before closing all programs, _________ you could have problems.

  A.or

  B.and

  C.but

  D.so

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• 3_______ late you are, we will wait for you to come to have dinner.

  A.Whenever

  B.Whatever

  C.However

  D.Wherever

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• 4We've offered her the job, but I don't know_________ she'll accept it.

  A.where

  B.what

  C.whether

  D.which

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• 5She was about to leave the room _____ the telephone rang.

  A.when

  B.while

  C.after

  D.since

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• 6The engineers are so busy that they have zero time for outdoor sports activities, _____they have the interest.

  A.wherever

  B.whenever

  C.even if

  D.as if

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• 7Studying in groups is necessary_____ you want to do well in school.

  A.if

  B.until

  C.unless

  D.though

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• 8Students are required to go out in couples, especially in the evenings, with friends ______ they get into trouble.

  A.even if

  B.if only

  C.in case

  D.when

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• 9It is difficult for us to learn a lesson in life ______ we've actually had that lesson.

  A.until

  B.after

  C.since

  D.when

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• 10______ the day went on, the weather got worse.   

  A.With

  B.Since

  C.While

  D.As

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