IV. Употребите Present Perfect или Past Perfect:

10. We (to finish) our test by that time. 11. You (to finish) your work? 12. I didn't want to see the film because I (to see) it on TV. 13. We (to wait) for an hour but they never came. 14. Since what time he (to sleep)? 15. By the time he was twelve, he (to be able) to speak two foreign languages. 16. By the time the police came the robbers (to manage) to escape. 17. How long your club (to be) in existence? 18. Her daughter (not to return) home by eleven. 19. It (to snow) since last night, it's not safe to drive. 20. She (to make) already coffee by the time her son got up.