and guilty,Maggie put the book back on the shelf she had secretly placed in her
schoolbag.
A. Frightened
B. Frightening
C. Being frightened
D. To be frightening
网友回答
(答案→)A. Frightened
B. Frightening
C. Being frightened
D. To be frightening
解析： 考查非谓语动词。形容词作状语，表示谓语动作发生时，主语所处的状态，Maggie感到恐惧，所以用frightened。frightening表示“令人恐惧的”。