问题补充：
He isn’t a man who knows to deal with people properly, but he does know to do with all kinds of papers in front of him.
A. what, what
B. what, how
C. how, what
D. how, how
答案：
A. what, what
B. what, how
(答案→)C. how, what
D. how, how
解析：句意，他是一个不知道怎样正确处理和人交往的人，但他却知道怎样处理面前各种各样的报纸。Deal是不及物动词，to deal不需要逻辑宾语，所以前面用关系副词how.do是及物动词，to do需要逻辑宾语，故用关系代词what.故选C.
