XXI. Fill in the sentences with the required conditionals:

1. If my brother (to be) in trouble, I (to help) him, of course. 2. If he (to live) in St. Petersburg, he (to go) to the Hermitage every week, but he doesn’t. 3 I (to buy) the car if my friend (not to lend) me money last month. 4. If he ( not to live) in St. Petersburg, we (not to meet) so often but we do. 5. If he (to warn) me then, I (to do) the work in time. 6. If you (not to miss) the train, you would have arrived in time. Unfortunately you were late yesterday 7. You (not to miss) the teacher's explanation if you (to listen)to it, but you didn’t. 8. You (to understand) the rule if you (not to miss) the teacher's explanation the other day. 9. If you (to understand) the rule, you (to write) the paper successfully last Monday. 10. If you (to write) the paper successfully last Monday , you (not to get) a "two". Your mother (not to scold) you if you (not to get) a "two".. If your mother (not to scold) you, you would have felt happier. 11. If men (to have) no weapons, wars (to be) possible? 12. You never finish) your work if you (to waste) your time like you are doing.13. If she (to ask) me yesterday, I should certainly have told her all about it. 14. You are constantly catching cold! If you (to do) your morning exercises every day, your health (to be) much better. 15. Sometimes if he (not to be) very busy, he (to agree) to go to the museum with us. 16. How silly I was! If I (not to be) present at the lesson, I (to understand) this difficult rule. 17. If you (not to smoke), you (to feel )more energetic. 18. If her alarm clock (to ring), she (to be) on time for work this morning, but it didn’t. 19. If you (to be) on a hijacked plane, you (to attack) the hijackers? 20. If he (to be) on a hijacked plane, he (to stay) calm and probably (to survive). 21. If he (to read) fifty pages every day, his vocabulary (to increase) greatly. 22. If they (to know) it before, they (to take) measures. 23. If I (to get) this book, I (to be) happy. 24. If you really (to love) music, you (to go) to the Philharmonic much more often. 25. If you not (to waste) so much time, you (not to miss) the train. 26. If I (to live) two hundred years ago, I (to speak) on the telephone. 27. If my daughter (to do) her homework carefully, she (to get) much better marks. She's really a smart little girl. 28. If his friend (to be) in the mood to see a film, they (to go) to the cinema last night. 29. If my cactus plant (not to have) a rare disease, it (not to die). 30. If they (to remember) your address, they (to send) you a postcard when they were in Italy. 31. If Tom (to see) a car crash, he (to telephone) the police and (to help) the people in the cars. 32. If you (not to be) sure, what to say, you (to have) to guess. 33. If she (not to be) very ill, she (not to be) absent from English class all last week. 34. If my parents (to have) good seats, they (to enjoy) the play last night. 35. If a robber (to attack) him in a dark street, he (to defend) himself. 36. If he (not to be) so careless, he (not to fall) into this trap. 37. If the driver in front (not to stop) suddenly, the accident (not to happen). 38. If you (not to know) how to play, my sister (to explain) the rules to you. 39. If she (to tell) them it was her birthday, they (to give) her a birthday present. 40. I don’t have spare time. If I (to have) more time, I (to read) more books. 41. If their TV (to be) working, they (to watch) the President's speech last night. 42. The dish (to be) much more tasty last party if she (to be) a better cook. 43. He never (to phone) you if I (not to remind) him to phone that day. 44. Your brother (to become) much stronger if he ( to take) cold baths regularly, but he doesn’t. 45. If it (to snow) tomorrow, the children (to play) snowballs. 46. If he (to invite), he (to come) to the party last night. 47. If my mother (to win) a million pounds, she (to spend) it as fast as possible. 48. If you (to be) feeling well, you (to be) in class yesterday. 49. I don't believe you: you only say that you want to know languages. If you (to be) really interested in languages, you (to study) them. 50. If she not (to miss) the bus, she (not to be) late for work yesterday. 51. If she (to smell) smoke in the middle of the night, she (to telephone) the fire brigade and (to run) into the street and shout "Fire!" but she died 52. If my T-shirt (to be) 100 percent cotton, it (not to shrink) so much. 53. How can you become more popular in your class: if you (to get) the top mark in mathematics or English or if you (to be) good at sports? 54. If they (to go) by car, they usually (to save) time. 55. If I (to be) a bird, I (to be) able to fly. 56. If he (to bring) his book home, he (to do) his homework last night. 57. I like Byron very much. If I (not to know) English, I (not to be able) to enjoy Byron's poetry. 58. I (not to do) it if you did not ask me.