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    科目： 来源：同步题 题型：单选题

    He was told that it would be at least three more months _____ he could recover and return to work.

     [     ]

    A. when
    B. before
    C. since
    D. that

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    科目： 来源：同步题 题型：单选题

    It's quite a time _____ Liu Xiang was injured in the foot, but we're sure it won't be long _____ he returns to
    the track.

    [     ]

    A. after; when
    B. before; since
    C. that; when
    D. since; before

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    科目： 来源：同步题 题型：单选题

    A computer is so useful a machine___ we can use everywhere.

    [     ]

    A. that
    B. which
    C. as
    D. what

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    科目： 来源：同步题 题型：单选题

    John thinks it won't be long _____ he is ready for his new job.

    [     ]

    A. when
    B. after
    C. before
    D. since

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    科目： 来源：同步题 题型：单选题

    — Tom is a sunny man.
    — Yeah. ______ he is poor, he looks happy.

    [      ]

    A. As if
    B. In order that
    C. Even if
    D. So that

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    科目： 来源：同步题 题型：单选题

    There is a widespread belief among the science world ____ we keep on _____  the earth as we are doing today,
    the exist ence of us humans on this planet will be out of the question in some years yet to come.
    [     ]
    A. if; polluting
    B. if; to pollute
    C. that if; to pollute
    D. that if; polluting

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    科目： 来源：同步题 题型：单选题

    It is partly ______ the summer day is longer that everything has a larger time to warm up.

    [     ]

    A. for
    B. that
    C. the reason
    D. because

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    科目： 来源：同步题 题型：单选题

    _____ you drive carefully, you will be very safe.

    [     ]

    A. As if
    B. As long as
    C. Even if
    D. In case

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    科目： 来源：同步题 题型：单选题

    _____we are not attacked by nuclear weapons, we promise that under no circumstances _____ use the
    bomb first but we reserve the right to use it for counter-attack when necessary.

    [      ] 

    A. As long as; we shall
    B. If; shall we
    C. So long as ; shall we
    D. Even if; we shall

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    科目： 来源：同步题 题型：单选题

    You may use room as you like ____ you clean it up afterwards.

    [     ]

    A. so far as
    B. so long as
    C. in case
    D. even if

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