Ответ:
Номер 1
1a
2a
3a
4an
5an
6a
Номер 2
1it
2he
3it
4it
5she
6they
Номер 3
1we are 10 yo
2it is on the desk
3they are classmates
4it is in the room
Oh! It's summer! It's very sunny and hot day! The nature is so wonderful! Everybody is happy!