— Sam hasn't come yet.

— He likes to watch football match, ______? So I'm sure he'll come. [ ]

A. doesn't he

B. does he

C. isn't he

D. is he

男31岁，尿频、尿急、尿痛1年余，有时尿浑浊，服用多种抗生素治疗无效，尿液检查：脓细胞满视野，蛋白(++)。B超提示右肾积水，输尿管探测不清楚。

最可能的诊断为

A．膀胱炎

B．膀胱肿瘤

C．膀胱结石

D．泌尿系结核

E．膀胱憩室