1. He was ________ by the loud noise and a ________ look appeared on his face.
问题描述：
1. He was ________ by the loud noise and a ________ look appeared on his face.
A. fright; frightened B. frightened; frightening
C. frightened; frightenedD. frightened; frightful
为什末选C,不选B
答
前面的过去分词frightened表示他感到害怕,后面的frightened表示“他害怕”的表情,所以用C.如果后面用frightening,它的意思是“令(别)人”感到害怕的表情.