— Is your mother a bus driver？
— Well, she , but now she is a shopkeeper.
A. used to
B. used to be
C. use to be
D. is used to being
网友回答
A. used to
(答案→)B. used to be
C. use to be
D. is used to being
解析：used to do 的意思是，过去常常做某事，而现在不做了. be used to doing /sth 是习惯于（做）某事 的意思