He felt rather that she should drive the car at such a speed.A. frightening, frighteningB

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A. frightening, frightening
B. frightened, frightened
C. frightening, frightened
(答案→)D. frightened, frightening
解析：过去分词frightened意为“吓坏了的”，表状态，通常修饰人；现在分词frightening表示“令人心惊胆战的”，通常修饰物。