选择D 其实 就是sit on a chair talk with nobody
定语从句在从居主语与主句主语相同的情况下可以简写成动词不定式的形式
He has got a chair to sit__on__,but nobody to talk__with_
相当于He has got a chair which he can sit on but nobody whom he can talk_with
整句的意思是 他找到了一个可以坐的座位,但是没有可以交谈的对象