英语单选:The man suddely stopped as if____whether

问题描述:

英语单选:The man suddely stopped as if____whether
The man suddely stopped as if____whether he was followed.
A.seeing
B.having seen
C.to see
D.to have seen

选C
这句话的意思是:这个人突然停了下来,好像是在看有没有人跟着他.
这里的不定式短语是表示目的
如果用having seen 就不应该有whether,意思是:他突然停了下来,好像看到有人跟着他.