Time passed quickly and three months went by .we knew it .

问题描述:

Time passed quickly and three months went by .we knew it .

可用 before或and.

选C

Time passed quickly and three months went by we knew it.
楼主漏词了吧.补上之后就是:时间过得很快,不知不觉已经3个月了.
选before啊!

C before
时间过得太快了,三个月的时间在我们感觉到以前就过去了