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

 

A

【解析】

試題分析:句意：你必須戴上頭盔和救生衣用來保護自己，只是以防萬一你掉入水里。A萬一；B除非；C盡管；D因為，當……時候。根據(jù)句意可知戴這些東西的目的只是起防備作用，故答案選A。

考點：考查狀語從句。

 

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