помогите с 17 номером срочно!!!

1 Boys often run among desks during their breaks.
2 My sister seldom gets bad marks.
3 During our lessons we learn a lot of new things.
4 Why do you ask so many questions?
5 Don't speak loudly!
6 Did you miss you old school friends during summer?
7 In the fifth form we have 6 lessons every day.