单项选择题

The creation of UN was, perhaps, the most ______ achievement of the 20th century.

A．obscure
B．notable
C．acute
D．objective
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单项选择题
I want to talk about all these points in ______ order of importance.
A．declining
B．descending
C．plunging
D．falling
单项选择题
The man went to prison, but the two boys ______ with a warning.
A．took off
B．got off
C．kept off
D．set off
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