Speaker A: Hello may I speak to Alan Bright? Speaker B: ______A.Hello may I ask who you

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Speaker A: Hello, may I speak to Alan Bright? Speaker B: ______

A.Hello, may I ask who you are?

B.Hello, please wait for a moment and I"ll go to call him.

C.Speaking.

D.Hello, I"m Alan Bright.

请帮忙给出正确答案和分析,谢谢!

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