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

问题补充：

— 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：

(答案→)A. sing

B. to sing

C. sang

D. 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。