黏膜下肌瘤最常见的症状为（）.

A.下腹肿物

B.经量增多，经期延长

C.痛经

D.压迫症状

E.白带多

-Did you punish him for that?

-Yes,but I don't think I ________.[ ]

A．should have done so        

B．need to have done so

C．should do that            

D．ought have done that