单项选择题

While we appoint an agent, it is usual to make the appointment ( ).

A．in writing
B．on paper
C．with writing
D．write down
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单项选择题
The production of computer in China is significant, ( ) one million annually.
A．amounts to
B．at the amount of
C．amounting to
D．amounting
单项选择题
That helps to explain ( ). businesses are setting up Net sites even though profits aren't yet very big.
A．that
B．the reason for
C．why
D．why that
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