you understand this rule, you’ll have no further difficulty.A. UntilB. UnlessC. ThoughD. O

发布时间：2020-08-17 00:35:48

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

网友回答

A. Until
B. Unless
C. Though
(答案→)D. Once
解析：考查连词：A. Until直到，B. Unless除非，C. Though虽然，D. Once一旦，句意是：一旦你理解了规则，你就不再有困难了。选D。
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