The man we followed suddenly stopped and looked as if whether he was going in the right d

问题补充：

The man we followed suddenly stopped and looked as if whether he was going in the right direction.

A. seeing

B. having seen

C. to see

D. to have seen

答案：

A. seeing

B. having seen

(答案→)C. to see

D. to have seen

解析：当as if后面直接跟一个动词时，常使用不定式to do来表示目的，相当于as if he were(was)to do sth说明动作的未完成性。答案为C。