单项选择题

[A] on [C] in
[B] to [D] about

A．on
B．to
C．in
D．about
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单项选择题
[A] raising [C] reducing[B] making [D] improving
A．raising
B．making
C．reducing
D．improving
单项选择题
[A] quickly [C] rapidly[B] regularly [D] recently
A．quickly
B．regularly
C．rapidly
D．recently
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