1. He (to buy) me a beautiful gift for my birthday. * has bought
2. The teacher (not return) the tests yet. *
hasnt returned
3. Humans (to discover) many planets. *

Это обязательный вопрос.
4. Weathermen (to collect) information about weather every day. *
5. Hurry up! Your classmates (to wait) for you. *
6. It (to be) calm and misty morning yesterday. *
7. I (to visit) my friends tomorrow evening. *
8. We (to work) here for three years. *
9. Computers (to influence) the world of science a lot. *
10. Somebody (to knock) at the door. Who can openthe door? *
11. The lesson (to start) ten minutes ago. *
12. My parents usually (to read) daily newspapers. *
13. Last lesson we (to learn) about ancient people. *
14. I am so happy to have a computer. I (always / want) one. *
15. Next Sunday he (to be) nine years old. *
16. She (to move) to another city last year. *
17. A huge tsunami (to ruin) the coastal city. *
18. John (not call) me recently. *
19. When I (to phone) him, he (to play) the piano. *
20. The weather (to become) really changeable recently. *
21. He (to clean) the garage at the moment. *
22. When I saw him, he (to try) to park the car. *
23. How long she (to know) about this problem? *
24. While I (to write) a letter, my (to come) home. *
25. Look! The baby (to smile). *
26. Our neighbour (to be) in hospital since Friday. *
27. While Sam tea with his parents, Michael (to bring) him a note from the teacher. *
28. It (to snow) yesterday at 5 o'clock. *
29. They always (to celebrate) the holiday. *
30. At last I (to find) my keys. *