下列句中为什么要填写keep health?

下列句中为什么要填写keep health? keep healthy 为什么不用health? keep in good health 同义句 英文中：保持健康是 keep health 还是keep healthy? keep health还是keep healthy keep health和keep healthy Bill is 介词 good health,he is pretty health 求那个介词为什么填写in keep in good health how to keep health keep you_______(health). How to keep health? keep health 英语作文