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    科目： 来源：不详 题型：单选题

    ______ the Internet is of great help, I don’t think it’s a good idea to spend too much time on it.
    A．IfB．AsC．BecauseD．While

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    科目： 来源：不详 题型：单选题

    ________ you have a large vocabulary, you will find it easy to read.
    A．OnceB．BeforeC．UnlessD．Even though

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    科目： 来源：不详 题型：单选题

    —— Oh, it’s raining hard outside. Mum, do you think the milkman will come?
    —— Of course. He will come on time _____it rains.
    A．in caseB．even thoughC．as long asD．ever since

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    科目： 来源：不详 题型：单选题

    -----Do you have a minute? I’ve got something to tell you.
    -----Ok, ______ you make it short.
    A．now thatB．if onlyC．so long asD．every time

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    科目： 来源：不详 题型：单选题

    _______ you work hard, you won’t solve this problem.
    A．EvenB．AsC．UnlessD．Since

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    科目： 来源：不详 题型：单选题

    Usually an adult man can grow about 1.7 meters tall, _____ a few may grow as short as 1.3 meters.
    A．whileB．orC．forD．so

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    科目： 来源：不详 题型：单选题

    The engineers are so busy that they have no time for outdoor sports activities, ________ they have the interest.
    A．whereverB．wheneverC．even ifD．as if

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    科目： 来源：不详 题型：单选题

    They had no sooner arrived at the airport       it was time to check in.
    A．whenB．beforeC．thanD．though

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    科目： 来源：不详 题型：单选题

    The Chinese government has made the Mid-autumn Festival a level holiday, _______people will have a day off.
    A．whenB．whichC．whereD．since

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    科目： 来源：不详 题型：单选题

    Professor Tang didn’t give us a speech today．It was        he had a traffic accident on the way to school．
    A．thatB．whenC．whyD．because

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