whom did he visit at the a village fair?还有一句whom did she tel

whom did he visit at the a village fair?还有一句whom did she tell him they had to meet at .
对于人称代词做宾语提问时必须要用whom是吧?但是在从句中的时候 也可以用who 我说的对吗?
第一句我知道whom是visit的宾语,但是第二句whom是谁的宾语 到底是tell的还是meet的?个人觉得应该是tell的,但是they had to meet at .又不知道做什么成分了,因为这样的话这个句子已经有2个宾语了him/ whom那么they had to meet at .做什么呢?如果做meet 的宾语 我还没见过 连接词跟后面的句子离那么远的,这样说不更好吗?she tell him whom （who) they had to meet at .这样tell 有两个宾语him和whom后面的
我想了一下she tell him whom （who) they had to meet at ....是不是 就是对连接词whom提问的呢？这样用who whom/who did she tell him they had to meet at ...