单项选择题

Reducing the gap between rich and poor is one of the main（）facing the government。

A.chances
B.challenges
C.chains
D.changes

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单项选择题
He never （） being looked on as a stupid student.

A.brains
B.heads
C.minds
D.wits
单项选择题
What’s that terrible noise？ The neighbors （） for a party.

A.have prepared
B.are preparing
C.prepare
D.will prepare
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