Question

Sofia looked around at all the faces: she had the impression that she _____ most of the guests before.

A．has seen

B．had seen

C．saw

D．would see

Answer 1

B

解析试题分析：before与完成时连用，根据动词had可知这里用的是过去式，而这里动词see发生在had之前，所以应是过去的过去，故应该用过去完成时。故选B。句意：Sofia向周围看了看所有的人，她对于以前见过的大多数客人都有印象。
考点：考查动词时态。