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11. He (teach) at school for five years when the war broke out.
12. Hi! What you (do) here since morning?
13. By the end of this year he (read) about two hundred pages.
14. When you (see) him last?
15. Don’t ring me up at 11 o’clock, I (sleep).
16. ‘You (find) your note-book?’ ‘No! I still (look) for it. I already (look) for it for two hours, but (not yet find) it.’
17. They (sail) down the river for many hours before they come to the village.
18. At last the librarian gave me the book which I (wait) for during two months.
19. He (write) the composition for three hours and he said he (finish) it soon.
20. On entering the drawing-room he (find) that his two friends (get) up and (wait) for him.