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    科目： 来源：不详 题型：单选题

    —Did you find the missing couple in the mountain yesterday?
    —No, but we ________ to get in touch with them ever since.
    A．have triedB．have been tryingC．had triedD．had been trying

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    科目： 来源：不详 题型：单选题

    －Oh, it’s you, Steve! I ________ you.
    －No surprising. I’ve just had my hair cut.
    A．don’t recognizeB．haven’t recognized C．didn’t recognizeD．hadn’t recognized

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    科目： 来源：不详 题型：单选题

    —You were out when I dropped in at your house.
    —Oh, I ________ for a friend from England at the airport.
    A．was waitingB．had waitedC．am waitingD．has waited

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    科目： 来源：不详 题型：单选题

    — I called you at ten, but there was no reply.
    —Oh, that was probably when I ________ a shower.
    A．am takingB．tookC．were to takeD．was taking

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    科目： 来源：不详 题型：单选题

    －The enemy spy was found at last. －Really? Where ________ himself?
    A．had he hiddenB．did he hideC．has he hiddenD．was he hidden

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    科目： 来源：不详 题型：单选题

    Why don’t you put the meat in the fridge? It will ________ fresh for several days.
    A．be stayedB．stayC．be stayingD．have stayed

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    科目： 来源：不详 题型：单选题

    —You must have met him the other day. —Oh, no, I ________ .
    A．hadn’tB．mustn’tC．haven’tD．didn’t

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    科目： 来源：不详 题型：单选题

    It is said in the book that Thomas Edison (1847—1931) ________ the world-leading inventor for sixty years.
    A．would beB．has beenC．had beenD．was

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    科目： 来源：不详 题型：单选题

    —What’s that terrible noise?
    —The neighbors ________ for a party.
    A．have preparedB．are preparingC．prepareD．will prepare

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    科目： 来源：不详 题型：单选题

    The student didn’t pay any attention to the lecture; he ________ of something else.
    A．thoughtB．had thoughtC．would thinkD．was thinking

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