问题
选择题
____ he has made a decision, it is not easy for you to make him change his mind.
A．Though
B．Unless
C．Once
D．Until
答案
答案：C
考查连词辨析。一旦他作出决定你不容易让他改变主意。A. Though 虽然 B. Unless 除非 C. Once 一旦 D. Until 直到 根据语境选C
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