1.
5 days a week / days off / on the timetable / subjects / doing sums / problems with / are over / twice a week.

2.
1) go
2) were / is
3) swam / was
4) are you going
5) will have
6) travels
7) are the children doing / is reading / are playing
8) we went / is
9) Does it take / takes
10) will go

1.
1-c 2-b 3-b 4-c 5-b 6-b

2.
1) Is our school day over at 3 o'clock?
   When is our school day over?
   Our school day is over at 3 o'clock, isn't it?
2) Does Mike play with his friends after the lessons?
   Who plays with his friends after the lessons?
   Does Mike play with his friends or with his brother after the lessons?