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    精英家教网 > 高中英语 > 题目详情

    【题目】 _______ you start eating in a healthier way, weight control will become much easier.

    A. unless B. Although

    C. Before D. Once

    【答案】D

    【解析】

    试题分析：句意：一旦你开始更健康的饮食，控制体重就会变得容易得多。Unless除非；Although尽管；Before 在……之前；Once 一旦。Unless相当于if not，引导条件状语从句；Although引导让步状语从句，不能和but连用；Before引导时间状语从句；Once引导具有条件意味的时间状语从句。根据语境和词义可知选D。

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