题目内容
You will fall behind the others ______ you start to work hard.
A.since | B.if | C.until | D.unless |
D
解析试题分析:句意为:如果你不努力,你就会比别人落后。since:自从……以来,if:如果,until:直到……, unless:如果不、除非。根据语境可知应选D。
考点:考查连词。
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