1. Which hobby do you think takes up the most space?你认为哪种爱好占地方最多?
take up意为“填满,占据(某空间或时间)”。例如:That big color TV set takes up too much room.
那个大彩电太占地方。
most是much的最高级,“最多的”;much的比较级是more,“较多的,更多的”,在句中通常用来修饰不可数名词。例如:He's the best teacher because he has the most experience.他教得最好因为他有最多的经验。

2. Sorry,it's a bit of a mess. 1'll put the fans on the shelf.对不起,有点乱。我会把这些扇子放到架子上。
a bit表示“稍微、一点儿”,可以用来修饰动词以及形容词、副词的原级、比较级。a bit of表示“一点儿”,可以用来修饰名词。例如:
This book costs a bit (too) much.这本书有点(太)贵了。We have a bit of time.我们有点时间。
shelf“隔板;架子”,其复数形式为shelves。例如:What a mess! Let's put these books on the shelves.多乱啊!让我们把这些书放在架子上吧。