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.

We had finished our test by that time. 11. Have You finished your work? 12. I didn't want to see the film because I have seen it on TV. 13. We had waited for an hour but they never came. 14. Since what time has he  slept? 15. By the time he was twelve, he had been able to speak two foreign languages. 16. By the time the police came the robbers  had managed to escape. 17. How long have your club been in existence? 18. Her daughter had not returned home by eleven. 19. It has snowed since last night, it's not safe to drive. 20. She  had already made coffee by the time her son got up.

Hasn't been reading
have they been learning
haven't been driving
has been walking
has been digging

had been chatting
had been waiting
had been sitting
had been jogging, got
had been waiting, arrived

will have been dancing
will have been cooking
will have been working
will have been studying
will have been renovating

by the end of next month i will have been learning right for 6 years
i had been writting the letter for 2 hours when my brother came from work
to the moment we waked him up he had been sleeping for 12 hours
she has been studying french for 11 years

Oh , man ! Don't be so sad , it is not the latest exam in your life . Don't take this situation too close to your heart . Be calm like a boa ! You should study harder and you will pass your math exam . Last year I had the same trouble with my history exam . But I paid much attention to the details and I could pass it . It was conducted in oral form . In your case , you should understand the rules and mathematical formulas. I can advice you an experienced math tutor . He is professional in this field . He will help you to prepare to your math exam properly. Here is his telephone number : 777-555. I am sure you will succeed.