英语填空题用适当的关系代词that,which,who,whom填空：1.The first thing_______y

英语填空题
用适当的关系代词that,which,who,whom填空：
1.The first thing_______you must do is to make a plan.
2.The young man___________you saw over there is a famous football player.
3.Please pass me the dictionary___________lies on the shelf.
4.A nurse is a person________looks after people who are ill.
5.We talked about the things and persons________we saw then.