Hearing the ________ sound,Susan was so ________ that she lost her sense．A.frightening; frighteningB.frightened; frighteningC.frightened; frightenedD.frightening; frightened
网友回答
D解析第一个空修饰的名词是sound，表示“声音”本身的性质，用-ing形式；第二个空说明的是人的状态，表示Susan听到声音后的反应，用-ed形式。所以本题选D项。