John look at the timeyou play the piano at such a late hour?A. MustB. CanC. MayD. Need

问题补充：

John, look at the time. you play the piano at such a late hour?

A. Must

B. Can

C. May

D. Need

答案：

(答案→)A. Must

B. Can

C. May

D. Need

解析：句意，John，看一下时间，你一定要在这么晚弹钢琴吗？Must 必须 Can 能 May 可能 Need需要。