问题
选择题
— Are you a teacher?
— No, but I _____. [ ]
A. used to
B. was used to
C. used to be
D. used to do
答案
答案:C
— Are you a teacher?
— No, but I _____. [ ]
A. used to
B. was used to
C. used to be
D. used to do
答案:C