By the middle of this century, the majority of the world's population ________ in cities．

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• 1I ________ my key to my office at home, so I had to wait until other teachers ________ to open the door．

  A.had left; came

  B.left; came

  C.has left; came

  D.left; would come

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• 2Mr Black ________ Shanghai in a few days．Do you know when the earliest planeon Sunday?

  A.leaves; takes off

  B.is leaving; is taking off

  C.is leaving; takes off

  D.leaves; is taking off

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• 3It's reported that, to our great joy, two special government projects to protect the Yangtze River, are now ________．

  A.by the way

  B.under way

  C.in the way

  D.in a way

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• 4Wang Hua is said ________ a new computer programme recently, and it sells well at home and abroad．

  A.to design

  B.to be designed

  C.to have been designed

  D.to have designed

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• 5They gave live broadcast while the performance was ________ on the stage．

  A.in need

  B.in fact

  C.in process

  D.in the lead

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• 6By the end of this month, we surely ________ a satisfactory solution to the problem．

  A.have found

  B.will be finding

  C.are finding

  D.will have found

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• 7By the end of next July this building ________．

  A.will be completed

  B.will have completed

  C.will have been completed

  D.has been completed

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• 8The secretary said that：“If you had phoned our company earlier, your request ________ at our next meeting．”

  A.would have been considered

  B.will be considered

  C.were to be considered

  D.would be considered

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• 9The scientist ________ that there would be a rainstorm the next week and it did happen．

  A.predicted

  B.related

  C.observed

  D.debated

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• 10He is determined to further his study the year he ________ from college．

  A.graduates

  B.will graduate

  C.has graduated

  D.will have graduated

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