—Listen Lily is playing the piano! —Wow how sweet the music !A. is heardB. hearsC. is so

问题补充：

—Listen, Lily is playing the piano!

—Wow, how sweet the music !

A. is heard

B. hears

C. is sounding

D. sounds

答案：

A. is heard

B. hears

C. is sounding

(答案→)D. sounds

解析：考查系动词用法。本题的sound是系动词意为“听起来”；句子的sweet是一个形容词在句中做表语。句意：—听,Lily在弹钢琴。—她的音乐听起来真好听啊！系动词是埋头于被动语态和进行时的。动词hear不是系动词，只是一个行为动词。故D正确。