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    科目： 来源：不详 题型：单选题

    The town’s drinking-water _____ with prim chemicals at present.
    A．contaminatesB．is contaminated
    C．is being contaminatedD．has been contaminated

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    科目： 来源：不详 题型：单选题

    “What place is it?” “Haven’t you found out we _____ back where we ______?”
    A．were, had beenB．have been, are
    C．are, wereD．are, had been

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    科目： 来源：不详 题型：单选题

    I don't really work here; I ____ until the new secretary arrives.
    A．just help outB．have just helped out
    C．am just helping outD．will just help out

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    科目： 来源：不详 题型：单选题

    Scientists think that the continents ____ always where they ___today.
    A．aren't; areB．aren't; wereC．weren't; areD．weren't; were

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    科目： 来源：不详 题型：单选题

    The Titanic, the biggest ship of its day, ____ unsinkable, but it sank on its first voyage in 1912.
    A．thoughtB．was thoughtC．thought itD．was thought it

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    科目： 来源：不详 题型：单选题

    —I say, Harry. What did you say to the laid-off worker just now?
    —Nothing. I ____ to myself.
    A．had only talkedB．am only talking
    C．have just talkedD．was just talking

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    科目： 来源：不详 题型：单选题

    The novels written by the author sell best, but five years ago no one could have imagined how great a role he _____in the literary world.
    A．was playingB．was to playC．had playedD．played

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    科目： 来源：不详 题型：单选题

    —I wonder if your wife will go to the ball. 
    —If your wife does, so _____ mine. 
    A．isB．doC．doesD．will

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    科目： 来源：不详 题型：单选题

    —When will the train start？
    —It _____ at 2:35 in the afternoon according to the timetable. 
    A．startsB．will startC．would startD．started

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    科目： 来源：不详 题型：单选题

    Has everything _____ can be done ______?
    A．what; done　　　B．that; been done
    C．that; already doneD．what; already being done

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