摘要:第一节单项选择(共15小题,每小题1分.满分15分) 从A.B.C.D四个选项中选出可以填入空白处的最佳选项. 21.-Shall I begin the lecture? -I’m afraid we have to wait for a while. John is coming with a microphone. - . I can do without the microphone. A.I’m sorry B.Excuse me C.I beg your pardon D.Never mind

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