Listen! My sister the piano in her room.A. play B. is playingC. playsD. Playing

问题补充：

Listen! My sister the piano in her room.

A. play

B. is playing

C. plays

D. Playing

答案：

A. play

(答案→)B. is playing

C. plays

D. Playing

解析：句意:听!我的姐姐正在她的房间里面弹钢琴.结合语境可知本句描述的是现在正在进行的动作,故用现在进行时态,选B.