—Do you mind if I use a phone? —A. Why not?B. That’s all right.C. Come on!D. Be my guest!

问题补充：

—Do you mind if I use a phone?

—

A. Why not?

B. That’s all right.

C. Come on!

D. Be my guest!

答案：

A. Why not?

B. That’s all right.

C. Come on!

(答案→)D. Be my guest!

解析：考查交际用语：A. Why not?为什么不？B. That’s all right.好的，C. Come on!加油， D. Be my guest!请便，句意：--你介意我用电话吗？--请便，选D。