Question

Ju Hua Tai is a popular song among young people, ___were often heard singing it in Karaoke.

1. A.
   which
2. B.
   who
3. C.
   that
4. D.
   what

Answer 1

B
考察定語從句。一旦判定為定語從句，就應(yīng)該排除what ,又因為非限定性，所以排除that .因為先行詞是young people 所以選who.