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.C.D四个选项中.选出可以填入空白处的最佳选项.并在答题卡上将该项涂黑. 21.-Here you are at last! - A. Are you all right? B. Yes, I `m here. C. You are here, too. D. Sorry for having kept you waiting that long.

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