单项选择题

A．I’ m Mary.
B．Can I help you
C．Sorry, the line is busy.
D．Sorry, he’s not in.
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单项选择题
A．Sunbathing.B．Having a bath.C．Watching the sunset.D．Swimming.
A．Sunbathing.
B．Having a bath.
C．Watching the sunset.
D．Swimming.
单项选择题
The function that broadband technology has on the new digital economy is ______.
A．further
B．critical
C．costly
D．global
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