Youshoulddevoteasmuchtimeasyoucan

You should devote as much time as you can ______ the piano.

A．to practicing playing B．practice play

C．practice playing D．to practicing play

句意：你应该尽可能多花时间练习*钢琴。practice 动词，练习；practice doing练习做某事；devote …to…奉献，致力于; to为介词，所以使用动名词practicing。故选A。