问题 选择题
That piece of music sounds quite familiar. Who _____ the piano upstairs?
A. has played
 B. played
 C. plays
 D. is playing
答案

D

考查时态。句意:这段音乐听起来很熟悉。谁在楼上弹钢琴?可知下文描述的是正在发生的动作,故用现在进行时态,选D 。

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