__________ by the noise in the night, the girl did not dare to s

__________ by the noise in the night, the girl did not dare to sleep in her room.
A、Frighten
B、Frightening
C、Frightened
D、To frighten
【正确答案】：C
【题目解析】：Frighten 做非谓语，与主语为被动关系，用过去分词形式，frightened