Правильно ли я вставила по ? : use the prepositions in, for, on, to, of, at where necessary. 1)she is never late at school. 2)we don`t have computer-surfing on our timetable. 3)they do a lot of sums in class. 4)i don`t like to sit in- the desk in front of the teacher. 5)i`m happy we have sport 4 times in a week. 6)the browns are leaving moscow to paris on monday. 7)my sister must go to bed at 9 o`clock.she is five years old. буду где подчёркнуто,там надо вставить.