——Are your parents doctors, too?
——No, they are teachers. of them love teaching very much.
A. All
B. Both
C. None
D. Neither
网友回答
A. All
(答案→)B. Both
C. None
D. Neither
解析：本题主要考查代词辨析，all全部用于三者以上；both两个都；none全部否定；neither两个都不，根据题意，父母不是医生是教师，他们都喜欢教学，故选B。