单项选择题

[A] raising [C] reducing
[B] making [D] improving

A．raising
B．making
C．reducing
D．improving
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单项选择题
[A] used [C] cost[B] spent [D] needed
A．used
B．spent
C．cost
D．needed
单项选择题
[A] trip [C] business[B] works [D] travel
A．trip
B．works
C．business
D．travel
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