He'll never say a word about it you have explained it to him.A. onceB. beforeC. on order

发布时间：2020-08-15 01:38:11

He'll never say a word about it      you have explained it to him.
A. once
B. before
C. on order that
D. so that

网友回答

(答案→)A. once
B. before
C. on order that
D. so that
解析：once意为:一旦,引起时间状语从句.
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