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l6th yesterday. 12 I don’t think it was. It can’t have been Tuesday yesterday. It must have been Wednesday yesterday. 13 I don’t think it was. It can’t have been the 19th yesterday. It must have been the 20th yesterday. 14 I don’t think it was. It can’t have been cheap. It must have been expensive. 15 I don’t think it was. It can’t have been easy. It must have been difficult. 16 I don’t think she was. She c an’t have been old. She must have been young. 17 I don’t think he was. He can’t have been ill. He must have been tired. 18 I don’t think they were. They Can’t have been listening to the radio. They must have been Watching television. 19 I don’t think she was. She can’t have been retiring. She must have been looking for a new job. 20 I don’t think they were. They can’t have been sitting. They must have been standing. 新概念英語第一冊課后答案Lesson131~132 A 1 Yes, Martin is talking to Gary. 2 They may go abroad. 3 Gary’s wife wants to go to Egypt. 4 They will travel by sea. 5 Ye