—Everybody says you are a good student，you never fall asleep in class，do you？ — A. Yes，so

—Everybody says you are a good student，you never fall asleep in class，do you？
— ．
A. Yes，sometimes
B. No，I did
C. Yes，never
D. Yes，I didn't

(答案→)A. Yes，sometimes B. No，I did C. Yes，never D. Yes，I didn't解析：按照句意此处为有时候是这样符合语法表达习惯。其他选项为错误答案。

就是这个解释