The man we followed suddenly stopped and looked as if whether he was going the the right direction.
A. seeing
B. having seen
C. to have seen
D. to see
网友回答
A. seeing
B. having seen
C. to have seen
(答案→)D. to see
解析：考查非谓语动词。句意：我们跟踪的那个人突然停下四处张望，好像是为了确认他走的方向是否正确。这里考查动词不定式表示目的，stopped and looked to do sth停下来张望是为了做......，stopped, looked和see三个动作是同时发生的，因此不用不定式的完成时，排除C，故选D。