fill in the relative pronoun. put commas where necessary. write "i" for identifying, "ni" for non-identifying and if the relative can be omitted ot not. e. g. 1. mr cross, ..who.. lives next door, broke his leg last week. — ni, not omitted. 2. that's the woman drives the school bus. — 3. my sister is called sarah is younger than i am. — 4. the cake was covered in chocolate was delicious. — 5. i know a boy mother is a builder. —

2. That's the woman who drives the school bus. —  Identifying (not omitted)

3. My sister, who is called Sarah, is younger than I am. — NI (can be omitted)

4. The cake which was covered in chocolate was delicious. — I (если тортиков было несколько), not omitted

5. I know a boy whose mother is a builder. — I (not omitted)

Ask (спрашивать) - Asked - спросил
Do ( делать) - Did 
Want ( хотеть) - Wanted 
Steal (украсть) - Stole 
Be (быть, являться) - Was / were
Go (идти, ехать) - Went
Follow (следовать) - Followed 
Cut (резать) - Cut 
Call (позвать) - Called 
Watch (смотреть, сторожить) - Watched
У правильных глаголов время (2 форма) образуется с суффикса -ed, у неправильных глаголов вторая форма время) образуется не по правилам и вторую форму неправильных глаголов следует выучить, или посмотреть в таблице неправильных глаголов.

If I (1.  hadn't bothered) him with our problems so much last year he (2.  would have supplied) us with the required equipment. If we (3.  hadn't bought) a laptop for John, he (4. wouldn't be able) to use the e-mail now. If the television (5.  hadn't been invented) in the 19th century, it (6.  would have been invented) in the 20th. If James (7. had named) some great discoveries in the history of human civilization, he (8.  would have got) a good mark but his mark was poor. But for Isaac Newton the mankind (9. wouldn't know) the law of universal gravity. I know your parents are very unhappy. If I (10. were) you, I (11. wouldn't be) so indifferent to their problems. If they (12.  had had) various approaches to the problem, they (13. would have told) us about them. Let's ask them about it. I wish we (14. could) always predict the near future. If Paul (15. were not) a surgeon, he (16. would be) a scientist now. If he (17. were not interested) in science and technology, he (18. wouldn't have entered) the Science Department of Manchester University. But he is among the best students.