Speaker A: Did you check your e-mail today?

Speaker B: No. ______

A. Who cares?

B. Why do you ask?

C. Which one?

D. Why is it so?

［答案］B

【精析】说话人A问说话人B“今天查邮件了吗？”说话人B说“没有”，选项B（你为什么要问？）的言外之意是你有何事；符合题意，是正确答案。