摘要： -Hello. May I speak to David, please? - . A. I am David. B. Who are you? C. Speaking D. Do you really want him?
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—Hello. May I speak to David, please?
—____________.
—____________.
[ ]
A. I am David.
B. Who are you?
C. Speaking
D. Do you really want him?
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B. Who are you?
C. Speaking
D. Do you really want him?