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    精英家教网 > 高中英语 > 题目详情
    It is known to all that ____ you exercise regularly, you won’t stay healthy.
    A．becauseB．unlessC．now thatD．in case
    B

    试题分析：连词辨析。A因为；B除非，如果..不；C既然；D以防；句意：众所周知，如果你不经常锻炼，你就不会保持健康。故B正确。
    点评：本题的4个连词都是考试中常考的连词，特别注意unless，该词在使用的时候要改成if…not…。这样更便于学生的理解。
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