John kept looking at the pretty girl, wondering whether he her somewhere.
A. saw
B. has seen
C. sees
D. had seen
网友回答
A. saw
B. has seen
C. sees
(答案→)D. had seen
解析：句意：约翰一直看着这个漂亮的女孩，想知道他在什么地方看见过她。从前面的John kept looking at the pretty girl,可知这里是过去的过去的动作，用过去完成时，所以选D。