It was nearly an hour the sleeping pill effect.A. when; tookB. before; tookC. since; hadD

发布时间：2020-08-17 14:40:20

It was nearly an hour     the sleeping pill     effect.
A. when; took
B. before; took
C. since; had
D. before ; had

网友回答

A. when; took
(答案→)B. before; took
C. since; had
D. before ; had
解析：It was+一段时间+before…表示“过了….才…”take effect 表示（药等）见效；（法规等）生效
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