Put the words in brackets into the correct form.26. - I039;m

Put the words in brackets into the correct form.

26. - I'm thinking of buying a new computer.
- Yes, but computers (cost) so much money. What's wrong with the one we've got?
27. You see I (work) on a big project and I do not exactly know when I can take my holiday.
28. I (not read) a newspaper today yet.
29. -Sorry, I'am late.
- It's OK. I (not wait) for you long.
30. When one of the climbers saw that his friend was in trouble, he (run) to help.
31. Thank you for the offer, but I think I (stay) at home today.
32. If you revise, you (pass) an exam.
33. Who (to design) computer programs? - Software engineers do it.
34. Where (he/live) for the last 5 years?
35. (you/see) Paul in the concert yesterday?