高一英语完成句子三题&填介词一题~

高一英语完成句子三题&填介词一题~
1.用适当的介词或副词填空.
It is said that the president worked his way _____ college and Havard Law School.
（此题请翻译&解析）
2.我学画画只是为好玩.(每空一词!)
I _____ ______ drawing ____ ____ ____.
3.他很喜欢参加聚会.总是第一个来,最后一个走.
He loves parties very much.He is always ___ ___ ___ ___ ___ ___ ___ ___ ___ .（共9空）
4.怀特先生生病期间,他的侄子代他管理公司.
____ ____ ____ ____ ____ ,his nephew took his place to manage the company.
（这一题我知道要用while,但不懂“生病期间”怎么表达,该用什么时态）