第24题: [单项选择]Secretary: Good morning, Dr. Porter's office. Mr. Long: Good morning. I have an appointment with Dr. Porter at ten-thirty. I'm running a little late. ______ A. Is it OK B. Could I reschedule for eleven-thirty C. How about tomorrow D. Are you OK 参考答案:B 答案解析:[注释] 从意思、语气和表达法来看,B为最佳答案,意思为“我十一点半来行吗”。其他选项意思或语气不符合上下文的要求。