初二英语（选择适当的句子,补全对话）
A:What were you doing when the rain started?
B:___________
A:____________
B:No,she was leaving school when it started.
A:__________
B:_____________
A.Did she wait for a bus
B.Was your sister with you?
C.I was studying in the library.
D.Yes,and while she was waiting,the rain stopped.