问题
选择题
If you go into a store and feel that the clerk is being rude, stop and think that she____ a tough day, and put yourself in her shoes.
A．may have
B．may have had
C．must have
D．should have had
答案
答案：B
考查情态动词+have done的用法：may have done过去有可能做…,should have done本应该做而没做，句意是：如果你进入一家商店，觉得职员很无理，停下来想想，她可能过了很困难的一天，设身处地的为她想想。选B。