You will fall behind the others you start to work hard.A．sinceB．ifC．untilD．unless 题目和参考答案——青夏教育精英家教网—

题目内容

You will fall behind the others ______ you start to work hard.

A．since

B．if

C．until

D．unless

解析试题分析：句意：你会落在别人后面除非你开始努力工作。Since自从； if如果； until直到； unless除非。根据前后句句意可知该选D.
考点：考查连词。

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