met, it won’t be easily forgotten.A. If youB. when itC. onceD. Once you were

发布时间：2020-08-14 23:57:25

     met, it won’t be easily forgotten.
A. If you
B. when it
C. once
D. Once you were

网友回答

A. If you
B. when it
(答案→)C. once
D. Once you were
解析： once引导的条件状语从句，省略了it is。
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