--Hey, Mary, you are wanted on the phone.
--- I’m ing.
A. So what?
B. Hang on a minute.
C. That’s a good point.
D. What a shame！
网友回答
A. So what?
(答案→)B. Hang on a minute.
C. That’s a good point.
D. What a shame！
解析：句意：--喂，玛丽，你的电话。--请稍等，我马上就来。So what?那又怎么样呢？Hang on a minute稍等；That’s a good point这是一个很好的观点。What a shame真可惜。根据句意故选B。