My sister has bought a new car color is bright red.
A. its
B. that
C. whose
D. which
网友回答
A. its
B. that
(答案→)C. whose
D. which
解析：考查定语从句的关系词。本句的先行词的a new car，定语从句中的名称color前面缺少定语修饰。在定语从句的关系词中只有whose可以用来修饰名词在句中做定语。句意：我的姐姐买了一辆新车，它的颜色是大红色。故C正确。A项不是定语从句的关系词。BD项通常作为主语，宾语。