Вставте правильне допоміжне дієслово:
11. I ……….. seen you for ages.
12. We ………. meet him last week.
13. What …… you cooking?
14. I ….. been packing my case all morning.
15. You ……. not listening when I explained you the situation.
16. The letter ……… sent last month.
17. They ……… arrive next month.
18. Who ……. America discovered by?
19. We were waiting for them, but they ……….come.
20. How long ……… it take you to get home?