— Is Lily good at singing?　　　—Yes , she isWe often hear her in the next room．A. singB. to

— Is Lily good at singing?　　　—Yes , she is．We often hear her in the next room．
A. sing
B. to sing
C. sang
D. Sings

(答案→)A. singB. to singC. sangD. Sings解析：句意：李丽擅长唱歌吗？是的，她很擅长。我们经常听到她在隔壁房间里唱歌。Hear sb do意为“听见某人做了某事”；故选A。

我好好复习下