№6. 4. was

8. has worked

9. stopped

10. got

11. has done

12. was looking

13. has just bought

14. hasn't learnt

№4. 2. Because she has just broken up with her boyfriend.

3. Because I has just eaten a watermelon.

4. He's scared about his house, because the thiefs have just broken into the house.

5. Because she has just ordered a new clothes online.

6. Because I have just received an invitation on the tomorrow's party.