I           never           there before.         [ ]

A. have; been                  

B. have; gone            

C. have; been to                  

D. have; gone to

体外冲击波碎石禁忌证中，下列哪项是正确的( )

A．结石远段尿路有梗阻

B．安装有心脏起搏器者

C．妊娠

D．血尿

E．过于肥胖