The girl was so that she let out a cry.
A. frightening, frightened
Bfrightened, frightened
Cfrightening, frightening
Dfrightened, frightening
网友回答
A. frightening, frightened
B. frightened, frightened
C. frightening, frightening
(答案→)D. frightened, frightening
解析：考查形容词用法。Frightening令人害怕的（修饰事物）；frightened感到害怕的（修饰人）句意：女孩感觉非常害怕以至于她发出令人害怕的叫声。故D正确。