题目内容

Come on! You will catch up with others _______ you work hard.
A．ifB．unless
C．although D．so
A

试题分析：句意：加油！如果你努力学习，你将会赶上其他人。分析选项：if如果；unless除非；although虽然；so因此。考查if 引导的条件状语从句，体现主将从现的原则。句子的关系体现为如果……就……故选 A
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