Ответ:
1. They didn`t invite us.
2. My friend got a good mark.
3. Tom and Anna studied at the same institute.
4. We worked together for several years.
5. Did he freeze strawberries for winter?
6. My son drew a beautiful picture.
7. He repaired his car on Saturday.
8. Kate didn`t go to school, as she was sick.
9. Why did she say this only yesterday?
10. Did mum call me while I wasn`t at home?
11. We didn`t receive her reply yesterday.
12. I sent letters to my friends yesterday.
13. She bought a beautiful dress yesterday.
14. Yesterday we came back home late.
15. Who made this salad?
Объяснение: