He often practice the piano in his room.A. playB. playingC. to playD. played

问题补充：

He often practice the piano in his room.

A. play

B. playing

C. to play

D. played

答案：

A. play

(答案→)B. playing

C. to play

D. played

解析：practice后接动名词作宾语。 他经常在屋里练习弹钢琴。