you understand the rule, you can do it well.A. ForB. AsC. OnceD. While

发布时间：2020-08-14 23:56:07

     you understand the rule, you can do it well.
A. For
B. As
C. Once
D. While

网友回答

A. For
B. As
(答案→)C. Once
D. While
解析： once连词，引导状语从句，一旦。
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