.Most students used to listen to their teachers in class and pletely obey their teachers， ?
A. used they
B. weren’t they
C. didn’t they
D. did they
网友回答
A. used they
B. weren’t they
(答案→)C. didn’t they
D. did they
解析：当陈述部分含有used to时，附加疑问句可用use(d)n’t或didn’t。