Mary the piano every day she the piano now.A.plays is playingB.play is playingC. plays p

问题补充：

Mary the piano every day, she the piano now.

A.plays,is playingB.play,is playingC. plays, plays

答案：

解析：句意：玛丽每天弹钢琴，她现在正在弹钢琴。结合语境及时间状语，可知前文描述的是经常性动作，故用一般现在时态。下文描述的是现在正在进行的动作，故用现在进行时态。主语she是单数第三人称，故谓语动词用单数，选A。