Alice didn’t want her parents to know .
A. what has she done
B. what was she doing
C. how she had done
D. what she was doing
网友回答
A. what has she done
B. what was she doing
C. how she had done
(答案→)D. what she was doing
解析：句意：Alice不想让她的父母知道她在干什么。know后面的宾语从句用what引导，表示正在做某事。