§10. Exercise IX, p. 169

A. 1. Evidently the students didn't know (The students must have been unaware) that the timetable had been changed.

Nobody had told them. 2. He was surprised to hear that. He must have heard nothing of it before. 3. You must have been unjust to him. 4. Evidently, he didn't manage to persuade her to come with us. 5. He must have had no time for you so far. 6. They must have failed to meet him at the station. 7. He must have failed to recognize me, that's why he didn't come up to me. 8. You must have . made no attempt to do it, otherwise you wouldn't have said that it was easy. 9. The foreigner must have mispronounced the name of the dish, and the waiter brought him another dish. 10. Evidently you haven't been there for a long time. 11. She must have been told nothing about it. 12. They must have missed the train as they left the house too late. 13. He must have never guessed why we were laughing. 14. You must have put the key in the wrong place, so I couldn't get into the house. 15. They must have been misinformed. They were to have come today. 16. He must have had no chance to talk to her before. 17. You shouldn't be angry with him. Evidently he didn't want to hurt you. 18. There must be no one at home now. 19. Evidently she doesn't realize her error.

B. 1. It is not likely to rain tomorrow. 2. Evidently I shall be sent away on business. 3. He's sure to pass the exam. 4. He is not likely to wait for her arrival. 5. He is unlikely to finish the work by Friday. 6. She is sure to help you. 7. The director is not likely to receive her tomorrow. 8. She is not likely to take the child with her. 9. She is not likely to come. 10. It is sure to rain today. 11. Our team are not likely to win the match. 12. I am not likely to see Mary. I shan't probably be in Minsk at that time. 13. Could I talk to you tomorrow morning? — I shall probably be busy in the morning. 14. He will probably try to get tickets for the cup game.

§10. Exercise XIX, p. 174

1. Can/Could it be true? 2. It can't/couldn't be true. 3. Can/ Could they have lost the match? 4. They can't/couldn't have

lost the match. 5. Can/Could he believe that? 6. She can't/ couldn't have told you that. 7. She can't/couldn't have failed to tell you that. 8. He can't/couldn't have said that. 9. They can't/couldn't have finished the work. They started it only yesterday. 10. Can/Could they have quarrelled again? 11. He can't/ couldn't have got lost. He has been here several times.

12. Can/Could he have used the car during/in my absence?

13. Doesn't she like ballet? 14. Can/Could they have been waiting for us all this time? 15. They can't/couldn't be close friends. 16. He can't/couldn't have given up music. 17. She can't/couldn't have made a mistake. 18. Can/Could the sisters be so much alike? 19. He can't/couldn't have failed the exam. 20. You can't/ couldn't have got hungry. We had a good dinner two hours ago. 21. They can't/couldn't have arrived already. The train is to arrive at 7. 22. Hasn't he invited you to the wedding? 23. She can't/couldn't have been so foolish. 24. He can't/couldn't have failed to see it. 25. You can't/couldn't have been sent to me. I have nothing to do with this. 26. Can/Could he have seen them? 27. Where can/could he have seen them? 28. They can't/couldn't be waiting ^; for us. 29. Can/Could they be waiting for us? 30. Who can/ could they be waiting for? 31. Can/Could you have written it yourself? 32. He can't/couldn't have been unaware of the danger. 33. Didn't he phone you yesterday? He said he was going to. 34. Kate is late. What can/could have happened to her? 35. The children are not at home. Where can/could they have gone?