单项选择题

Only individual benefactors and ad hoc grants have made possible the ecological surveys already undertaken（）.

A．additional
B．governmental
C．special
D．organizational

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单项选择题
Laurel leaves are still an emblem of victory（）.

A．a symbol
B．a result
C．a suggestion
D．a spoil
单项选择题
Icy roads and poor visibility are familiar hazards in the Midwest（）.

A．chances
B．dangers
C．conditions
D．occurrences
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