【题目】The man we followed suddenly stopped and looked around as if ________whether he was going in the right direction.
A. seeing B. having seen
C. to see D. to have seen
在线课程【答案】C
【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。