Question

your parents are.the persons whom you can rely

your parents are the persons（ ） you should write.A to whom B that C whom D who 这里各个选项详解

Answer 1

A to whom
whom为宾语,你可以这样看：you should write to whom
如果选b,write 后面应该加to
如果选c,语法错误,只有write to sb没有write sb
如果选d,有2个错误,一个是漏了介词,一个是应该用宾语形式