Tom is one of the boys _____always on time.

问题描述:

Tom is one of the boys _____always on time.
A.that is B.who are
C.which are
D.who was
请问选择哪一个呢?为什么?

答案是B原句中who are always on time修饰the boys
如果是Tom is the one of the boys _____always on time就填who is修饰the one即Tom