问题补充：
-Everyone says you are a good student. You are never late for school，are you?-.
A. No，sometimes
B. Yes，sometimes
C. Yes，I did
D. No，I do
答案：
A. No，sometimes
(答案→)B. Yes，sometimes
C. Yes，I did
D. No，I do
解析：肯定回答： Yes，I am late sometimes.否定回答： No，I am never late.
