What should you say if you want to ask someone to come to the telephone的回答

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What should you say if you want to ask someone to come to the telephone的回答

Hello, may I have Mr. xxx please? Hello, can I speak to Mr. xxx please? Hello, I wanna speak to Mr. xxxHello I need to speak to Mr. xxxMr. xxx, please!语气从上到下逐渐强硬!