输尿管肿瘤最好发于（）

A.肾盂输尿管连接部

B.输尿管上段

C.输尿管中段

D.输尿管下段

E.膀胱壁内段

He likes playing _____ guitar but he doesn't like playing _____ basketball.   [ ]

A.  the; /      

B.  the; the      

C.  /; the        

D.  /; /