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Exercise 238. Paraphrase the following sentences using the verb must. Example: I am sure they have changed the time. — They must have changed the time. 1. They are in Greece. I am sure they are enjoying themselves. 2. She is an experienced teacher. I am certain she has been working at school for at least twenty years. 3. They have probably finished painting the house. 4.1 feel sure she is at home. 5. Probably they have already passed the frontier. 6. She is sure he is playing cards with his friends. 7. She is not very young, as she seems to be. I think she is nearly forty. 8.1 think you have visited this place before. 9. He has to do a very urgent task. I feel sure he is working now. 10. He is so absent-minded. I am sure he left the letter unanswered. 11. You know he is a good tennis player. He is no doubt has won this match. 12.1 shan't bother you any longer; no doubt you feel tired of my talking after a tiring day. 13. It is clear that they are expecting somebody. 14. She was obviously upset by something; I never saw her so nervous. 15. The youth is probably reading something funny. He is smiling all the time. 232
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