We often hear her this song.A. singB. singsC. to singD. singing

问题补充：

We often hear her this song.

A. sing

B. sings

C. to sing

D. singing

答案：

(答案→)A. sing

B. sings

C. to sing

D. singing

解析：hear的用过有两个：hear sb. do sth.“看到某人经常做或者做过某事”；hear sb. doing sth.“看到某人正在做某事”。本句的意思是“我经常听见她唱歌”所以本题选A。