单项选择题

May I speak to Dr. Brown?（）

A.Yes, he is not in at the moment.
B.No, you can't.
C.Yes, this is Brown speaking.
D.Sorry, speaking.

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单项选择题

A.No, they are mine.
B.No, you can't.
C.Sure.
D.Yes, you can.

单项选择题

A.Sure.
B.No, you can't.
C.No, they are mine.
D.Yes, you can.

单项选择题

A.I don't mind
B.It doesn't matter
C.You do it please
D.Go ahead