­­­­­­­­­­­­------Is Bob still performing?

------I’m afraid not. He is said        the stage already as he has become an official.

A．to have left

B．to leave

C．to have been left

D．to be left

男，50岁，间歇性全程肉眼血尿1年余。血尿伴有不规则小血块及轻度膀胱刺激征状，不发热，起病以来体重减轻约2.5Kg。CT检查发现膀胱左侧壁有一直径4cm大小广基肿瘤，侵犯膀胱壁几乎达全层，左输尿管上段扩张，提示为膀胱癌。

最佳治疗方案是()

A．膀胱灌注

B．膀胱局部放疗

C．膀胱全切，尿流改道术

D．经 * * 膀胱肿瘤激光切除术

E．经 * * 膀胱癌电切除术