题目内容：

She has never been to the Great Wall before.Today she saw it ___ the first time.A.at B.for C.in D.
She has never been to the Great Wall before.Today she saw it ___ the first time.
A.at B.for C.in D.by
答案是选B,但我想知道A为什么不对.
还有就是这四个选项中的短语都成立吗,如果成立的话该怎么用呢?请分别说明,

优质解答

at the first time 是介词短语,是“在第一次” 强调顺序.for the first time 是第一次,是个副词短语,在句子中做状语,强调的是首次.in the first time好像没有这个用法,by the first是“在第一次以前”.

追问：

哦，原来是这样。我还想问下有没有would better ... than...这种用法？