He is one of the persons who ___ the ___ to this question.a.knows...reply b.know...answer c.knowing ...secret d.has known ...key
问题描述：
He is one of the persons who ___ the ___ to this question.
a.knows...reply b.know...answer c.knowing ...secret d.has known ...key
答
b
答
a
答
B
在这里who 代替的是先行词persons,所以动词要用复数,know