问题补充：
Her son Coke, but now he milk.
A. used to drink ; is used to drinking
B. used to drinking ; drinks
C. is used to drinking; used to drink
D. is used to drink; is drinking
答案：
(答案→)A. used to drink ; is used to drinking
B. used to drinking ; drinks
C. is used to drinking; used to drink
D. is used to drink; is drinking
解析：be used to sth习惯于某事;used to do sth过去常常做某事.句意:他的儿子过去常常可乐，但是现在他习惯了牛奶。故选A。
