问题补充：
In the past few years, “My Heart Will Go On” was a popular song among young people, were often heard singing it at parties.
A. who
B. where
C. which
D. what
答案：
(答案→)A. who
B. where
C. which
D. what
解析：who引导非限定性定语从句，指代先行词又能够people在从句中作主语。
【标签】非限定性定语从句
