1. have just sent
2. was cooking
3. is attending
4. A robot was being made in the schoolyard by students.
5. We must be given some suggestions.
6. She asked us not to copy the answers from the Internet.
7. She asked me how long I had lived in Paris.
8. Laura has not sent us a letter for a year.
9. Kate has worked in this company since 2019.
10. She suggested Tom should study harder.
11. Those students whose exam results are not good are lazy.
12. My brother, who works in Warsaw, earns a lot of money.
13. My car which I bought last month broke down again.
14. If they knew how to cook, they wouldn't eat out frequently.
15. If there weren't any changes in the exam format, students wouldn't be tired.
16. I wish I told you immediately.
17. She plays tennis skillfully.
18. My mother cycles slowly.
19. I am a bad swimmer.
20. These children are quick runners.