—I remember you were a talented pianist at college.Can you play the piano for me?

—Sorry，I ________ the piano for years.(2012·湖南)

A．don't play

B．wasn't playing

C．haven't played

D．hadn't played

胸腔闭式引流术后患者若生命体征平稳，应取（）卧位，以利引流。

A、平卧

B、半卧位

C、侧卧位

D、端坐位