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

If I (1. hadnt bothered) him withour problems so much last year he (2. would have supplied)us with the required equipment. If we (3. hadnt bought) alaptop for John, he (4. wouldnt be able) touse the e-mail now. If the television (5. hadnt beeninvented) in the 19th century, it (6. would have beeninvented) in the 20th. If James (7. had named) some greatdiscoveries in the history of human civilization, he (8. would have got) a good mark but his mark was poor. But for Isaac Newtonthe mankind (9. wouldnt know) the law of universalgravity. I know your parents are very unhappy. If I (10. were) you, I (11. wouldnt be) so indifferent totheir problems. If they (12. had had) various approaches to theproblem, they (13. would have told) us about them. Lets askthem about it. I wish we (14. could) always predictthe 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. wouldnt have entered) the Science Department ofManchester University. But he is among the best students.