This is the best book ______ I have ever read in the past years. A.when B.which C.that D.who

This is the best book ______ I have ever read in the past years. A.when B.which C.that D.who

C 因为前面有最高级修饰了.定语从句中有个规则,凡碰到最高级修饰的,必须用that 不能which.

c

选C.定语从句，先行词受形容词最高级修饰时，关系代词用that.

C
因为前面的先行词是最高级，所以只能用that ，不能用which