Question

Помогите с 11 по 21 (которые не сделаны), пожалуйста! Даю 30 баллов

Answer 1

11. Have contaminated 
12. Has studied 
13. Have writen
14. Has travelled
15. Have gone
16. Have brought
17. Has arrived
18. Has visited
19. Has made
20. Has invited
21. Has wanted