问题
选择题
-Your mother _______ take a bus to work?
-Yes. But now she usually goes to work on foot.
A．use to
B．used to
C．was used to
D．is used to
答案
答案：B
题目分析：句意：你的妈妈过去常常坐公交去上班吗？是的。但是她现在经常步行去上班。Used to do sth“过去常常做某事”；be used to doing sth“习惯于做某事”。故选B。