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    科目： 来源：不详 题型：单选题


    .  Three-fourths of the buildings ______.
    A．was destroyedB．is destroyedC．were destroyedD．has been destroyed

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    科目： 来源：不详 题型：单选题


    . Early to bed and early to rise ______ a man healthy, happy and wise.
    A．makingB．to makeC．makeD．Makes

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    科目： 来源：不详 题型：单选题


    . Mathematics ______ the language of science.
    A．isB．has beenC．areD．have been

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    科目： 来源：不详 题型：单选题


    .  None of them ______ my friends.
    A．isB．areC．wasD．has been

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    科目： 来源：不详 题型：单选题


    . Getting to other planets or to the moon _____ many problems.
    A．involveB．involvesC．involvingD．to involve

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    科目： 来源：不详 题型：单选题


    . In that country, the rich ______ richer, the poor, poorer.
    A．becomeB． has becomeC．becomesD．is becoming

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    科目： 来源：不详 题型：单选题


    . Not one in one hundred children exposed to the disease ______ likely to develop it.
    A．should beB．must beC．isD．are

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    科目： 来源：不详 题型：单选题


    ．Mother ______ us stories when we were young .
    A．was used to tellB．is used to tellingC．used to tellD． used to telling

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    科目： 来源：不详 题型：单选题


    Every possible means ____, but none ____ successful．
    A．has tried; has provedB．tried; proves
    C．has been tried; provesD．is being tried; is proved

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    科目： 来源：不详 题型：单选题


    .More patients  ＿＿　in hospital this year than last year.
    A．treatedB．have treatedC．had been treatedD．have been treated

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