You have to wear a helmet and a life jacket for protection, just you fall into the water.A. in case C. unless C. though D. as 题目和参考答案——青夏教育精英家教网—

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You have to wear a helmet and a life jacket for protection, just ___ you fall into the water.

A. in case C. unless

C. though D. as

【解析】

试题分析:句意：你必须戴上头盔和救生衣用来保护自己，只是以防万一你掉入水里。A万一；B除非；C尽管；D因为，当……时候。根据句意可知戴这些东西的目的只是起防备作用，故答案选A。

考点：考查状语从句。

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