Помогите пожалуйста!!!
Use the prepositions In, for, on, to, of, at where necessary.
1) She is never late _____ school/
2) We don't have Computer-surfing _____ our timetable.
3) They do a lot of sums _____ class.
4) I don't like to sit ____ the desk in front _____ the teather.
5) I'm happy we have Sport 4 times _____a week.
6) The Browns are leaving Moscow _____ Paris _____ Monday.
7) My sister must go _____ bed at 9 o'clock. She is five years old/
Заранее спасибо!!!