题目

It is several months ______ the whole country started to talk about whether driving after drinking alcohol should be punished.
A.before B.until C.since D.after

提问时间：2020-10-15

答案

it is several months 表示的是一个时间段,其中is = has been.而since通常和时间段搭配.
before和after填在这里句子像是说了一半没说完（像是punish后面应该有个that.怎么怎么了,然后整句是个强调句.）,这两个选项填上去整句话翻译过来就被有任何意义.多念几遍体会一下,只有since翻译时能带出“（已经）几个月了” 中的“已经”,使句子意义完整.
until的意思是“直到……之前一直……”如果填until,问题就在于------一直怎么样了?
和before与after一样,填until句子像是半句,没有意义.举个例子：She was considered a very timid girl until she gave a speech in front of many people for the first time.这句话才是有意义在的.
问题中这句话可以paraphrase一下,就是：The whole country have started to talk about whether driving after drinking alcohol should be punished for several months.
解题关键是要记住since常与一段时间搭配.
FYI
不知道说明白没