—Driving after drinking alcohol should be punished, I think.
—Sure, it is several months the ban came to effect in the whole country.
A. before
B. until
C. since
D. after
网友回答
A. before
B. until
(答案→)C. since
D. after
解析：It is 时间段+since +句子（句子用过去）
“--酒驾应该受到惩罚。--自从在全国开始实施已经几个月了。”
Come to effect 生效