问题
选择题
--Is your father a teacher?
---well, he _______.
A．used to
B．was used to
C．used to be
D．is used to be
答案
答案：C
C 考查used to的用法。“过去常常做……”used to do sth.,“习惯于......”be used to doing sth.“曾经是老师”, used to be中be的不能省略。