you understand this rule, you’ll have no further difficulty. A. OnceB. UnlessC. AsD. Unti

发布时间：2020-08-17 12:51:36

     you understand this rule, you’ll have no further difficulty.
A. Once
B. Unless
C. As
D. Until

网友回答

(答案→)A. Once
B. Unless
C. As
D. Until
解析：once引导的让步状语从句，意为“一旦”。句意为“一旦明白了这条规则，就再也没有困难了”。
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