问题补充:
The man we followed suddenly stopped ad looked as if whether he was going I the right direction.
A. seeing
B. having seen
C. to have see
D. to see
答案:
A. seeing
B. having seen
C. to have see
(答案→)D. to see
解析:选D。 as if 引导的状语从句是一个省略句,只剩下了目的状语to see。