There is a look on her face. She must have seen something horrible.
A. fright
B. frighten
C. frightened
D. frightening
网友回答
A. fright
B. frighten
(答案→)C. frightened
D. frightening
解析：词性及词义辨析。Fright n惊吓；恐怖的东西；V使…害怕；frighten V使…害怕；frightened adj感到害怕的；frightening adj 令人害怕的；通常都用过去分词转化的形容词修饰人，用现在分词转换的形容词修饰事物，但是look(表情)是与人有关的，仍然要你管过去分词转换的形容词修饰，故本题C正确。