A few years ago My Heart Will Go On was a popular song among young people were often h

问题补充：

A few years ago, My Heart Will Go On was a popular song among young people, were often heard singing it at parties.

A. who

B. which

C. they

D. that

答案：

(答案→)A. who

B. which

C. they

D. that

解析：句意：几年前《我心永恒》在青年们中间是非常受欢迎的，人们经常在聚会时唱首歌。这里是非限制性定语从句，先行词是people，关系词在从句中作主语，that不能引导非限制性定语从句，故选A。