【题目】-You frighten the baby when you make that noise. Don't do that!
-She's not __________. She knows I am playing with her.
A. frightening B. frightened
C. frighten D. fright
在线课程【答案】B
【解析】句意：——当你弄出那个响声时会惊吓到婴儿。不要那样做了！——她不害怕。她知道我正和她玩呢。根据句意可知frightened害怕的，受惊吓的；符合题意。frightening吓人的，可怕的，多修饰事物，不符合句意。