Thanks --------your help ,everything in the room is in good

Thanks --------your help ,everything in the room is in good order.(for/to)
Travellers---------our country enjoy the beautiful sights in Bejing.(for/by/to/till)
The best way to make sure that you can keep fit is to-------healthy eating habits.(find/create/develop/prepare)
We have spent-------money on English books.(a great deal of/a good many of/a plenty of/a number of)
What is -----population of China?China has-------population of 1.2 billion.(a/the)
It is -------here.(too much cold/very much cold/much cold/much too cold)
我是名老师,希望得到好的答案,