摘要:第一节:语法和词汇知识(共15小题,每小题1分.满分15分) 从每题所给的A.B.C.D四个选项中.选出可以填入空白处的最佳选项.21.-Hi, Betty, are you free at present? I have to ask you for a favor. - . With pleasure. A.Sorry, I am busy B.Go ahead C.Help yourself D.Ask, please 解析:考查交际用语.Go ahead 请(说)吧! 答案:B

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