lots of times the song doesn’t sound as nice as before.A. HearingB. To hearC. Having hea

问题补充：

lots of times, the song doesn’t sound as nice as before.

A. Hearing

B. To hear

C. Having heard

D. Heard

答案：

A. Hearing

B. To hear

C. Having heard

(答案→)D. Heard

解析：考查非谓语动词。句中逻辑the song，与hear之间的关系为被动关系，故用过去分词，选D。