Помогите для сестры надо очень
Задание: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 teacher.
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.
ПОМОГИТЕ ПЛИЗ БУДУ ОЧЕНЬ ОЧЕНЬ БЛАГОДАРНА