I hear you have got a set of valuable Australian coins.____ I have a look?Yes,certainly.

题目

I hear you have got a set of valuable Australian coins.____ I have a look?Yes,certainly.
A.Do B,May C.Shall D.should
答案是选择B,我想请问为什么不选择C

答案

may表示委婉的请求
shall表示请求通常是Shall we do Sth?