—How much should I pay for the dinner?—.A. You are welcome B. That's my pleasureC. It's m

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A. You are wele
B. That's my pleasure
(答案→)C. It's my treat
D. It's my charge
解析：选C　考查交际用语。句意：“这顿饭我该付多少钱？”“我请客。”You are wele“不客气”；That's my pleasure“非常高兴为你服务”； It's my treat “我请客”；It's my charge没有这个用法。故选C。