题目内容：

I noticed him ( )the teachers' office just now.
A.went into B.go into C.was going into D.came out of
请问要选哪一个

优质解答

B是对的.
notice后接动词原形do,表示看到全过程,或者接动名词doing,表示看到一部分.
选项里只有B是动词原形,其他都是过去式,所以选B.