My little sister is afraid of to stay at home alone.A. quietlyB. lonelyC. all the timeD. b

问题补充：

My little sister is afraid of to stay at home alone.

A. quietly

B. lonely

C. all the time

D. by herself

答案：

A. quietly

B. lonely

C. all the time

(答案→)D. by herself

解析：考察近义词,文中alone是一个人的意思,四个选项分别表示安静的、孤独的、一直和她自己。根据题意这个小女孩害怕自己一个人呆在家。选D。