单项选择题

Questions 19 to 22 are based on the conversation you have just heard.

A．Remove it.
B．Replace it.
C．Press a button.
D．Not mentioned.
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单项选择题
A．$60.00.B．$40.00.C．$48.00.D．$54.00.
A．$60.00.
B．$40.00.
C．$48.00.
D．$54.00.
单项选择题
A．41.B．410.C．14.D．214.
A．41.
B．410.
C．14.
D．214.
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