She felt rather that she should drive the car at such a speed. A. frightening frightening

问题补充：

She felt rather that she should drive the car at such a speed.

A. frightening, frightening

B. frightened, frightened

C. frightened, frightening

D. frightening, frightened

答案：

A. frightening, frightening

B. frightened, frightened

(答案→)C. frightened, frightening

D. frightening, frightened

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：她感觉非常害怕以至于她用一个令人害怕的速度开车；故C正确。