—Have you ever been to Shanghai?

—Yes. I _______ there a few months ago.

A. have been        B. went             C. have gone

睾酮治疗原发性和继发性男性性功能低下最有效的给药方法是（）

A.注射给药

B.肠道外给药

C.透皮给药

D.口服给药

E.直肠给药