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
You were ______ by your absence yesterday.
A．merciful
B．conscientious
C．conspicuous
D．impartial
单项选择题
I don't understand why people ______ such a beautiful garden with cans and bottles.
A．located
B．provided
C．protected
D．littered
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