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    【题目】It is known to all that _______ you exercise regularly, you won’t keep good health.

    A. unlessB. wheneverC. althoughD. if

    【答案】A

    【解析】

    考查连词。句意：众所周知，除非你经常运动，要不然你不会健康。A. unless除非；B. whenever无论何时；C. although尽管；D. if如果；是否。根据语境，表示“除非”，故选A。

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