题目内容
You will never gain success ______ you fully put your effort into your work.
A. although B. unless C. if D. because
B 【解析】句意:除非你全身心地投入到工作中去,否则你永远不会成功。考查连词辨析题。A. although尽管,表让步;B. unless除非,表条件;C. if如果,表条件;D. because因为,表原因。本句是条件状语从句,根据句意语境,可知if不合句意,故选B。
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