直肠手术最易损伤的泌尿器官是（）

A.膀胱

B.精索

C.前列腺

D. * *

E.输尿管

— Guess what! I've passed my oral English test and got A.

— Congratulations. You _____ practiced a lot. [ ]

A. must have

B. should have

C. must

D. should