摘要:第一节:单项填空(共15小题,每小题1分.满分15分) 从A.B人.D四个选项中.选出可以填入空白处的最佳选项.21. -Good afternoon, United Airlines. -Hello, I’d like to book one seat to Ottawa on a flight leaving sometime before next Friday. - A. Just a moment, please. B. Can I help you? C. Gook luck to you. D. What do you want?

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