填空题

In eliminating a lot of noise in the airport, pilots can also help, and they can ______.

【参考答案】

ease down at a smooth angle。
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According to the passage, by 2007, before its construction, a new building will have to ______.
单项选择题
A．Attending the party.B．Visiting some friends.C．Studying for an exam.D．Taking an exam.
A．Attending the party.
B．Visiting some friends.
C．Studying for an exam.
D．Taking an exam.
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