单项选择题

Why is Mr Mo unable to meet Mr Brown

A．He has to attend an important meeting.
B．He has to go to the airport to pick up someone.
C．He has to wait for an important phone call.
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单项选择题
The telephone company is going to
A．launch a nation-wide campaign to inform people about the change.
B．write most of the new numbers on White Pages directories.
C．inform about the change right away.
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