Exercise 7:

1. on
2. on
3. in
4. on
5. at

Exercise 5:

2). Anna doesn't hang out with her friends on Saturday mornings. Anna

plays tennis / Anna has a tennis lesson (Можно выбрать любой вариант)

3). Yulian doesn't do chores on Sunday mornings. Yulian plays computer games.

4). Anna and Yulian don't watch DVDs on Saturday evenings. Anna and Yulian hang out with their friends.

5). Anna doesn't do her homework on Sunday afternoons. Anna watches DVD.

6). Anna and Yulian don't play computer games on Sunday evenings. Anna and Yulian watch DVDs.

Irina doesn't works ON saturdays.

My birthday is ON 20th december.

He never works AT evenings.

They go to school ON weekdays.

I have a dancing lesson AT 6 o'clock.