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d to return home. 6 She must have been sleeping. B 1 I don’t think they were. They can’t have been Canadian. They must have been Australian. 2 I don’t think she was, She can’t have been Finnish. She must have been Russian. 3 I don’t think they were. They can’t have been Japanese. They must have been Chinese. 4 I don’t think they were. They can’t have been butchers. They must have been bakers. 5 I don’t think she was. She can’t have been a dentist. She must have been a doctor. 6 I don’t think he was. He can’t have been a sales rep. He must have been the boss. 7 I don’t think she was. She can’t have been seventeen. She must have been twentyone. 8 I don’t think they were. They can’t have been five. They must have been seven. 9 I don’t think he was. He can’t have been seventysix. He must have been over eighty. 10 I don’t think she was. She can’t have been fiftyfive. She must have been under fifty. 11 I don’t think it was. It can’t have been the 17th yesterday. It must have been t