Question

which girl is singing

-Which girl is your sister，Li Hong？
-The beautiful girl is singing is my sister．（　　）

A. which

B. who

C. where

Answer 1

答案：B；
首先分析句子结构，本句中的"_______ is singing"在复合句中作定语从句，由于先行词girl 为下文定语从句的逻辑主语，且指人，所以引导定语从句的关系代词用that或者who，故选B．