Статистика и теория вероятностей! Помогите пожалуйста с 111, 112, 116 номерами, буду очень благодарен!

1. My brother ………………… (finish) school last year.

2. He …………………….. (already/ leave) the office when we came there.

3. Sarah was upset because she ……………………. (fail) her exam.

4. She ………………… (clean) the flat by the time her parents came home from work.

5. We ………………. (sleep) when the burglars ………………….. (break) into our house.

6. After I …………………………. (do) my homework, I went for a walk.

7. He ……………………. (wait) for an hour before his friends arrived.

8. Nick ………………….. (come) home from school, …………….. (change) his clothes and ……..…………(go) for a walk.

9. My granddad was very tired because he ………………… (do) the gardening all day.

10. Daniel …………………… (play) football when he fell and broke his leg.

11. Claire wanted to go to the cinema with us but she …………………….. (not/finish) her work.

12. While I ……………………. (read) a magazine, my brother ………………….. (play) computer games.