◎ 题干
Beijing, ______for hosting the 2008 Olympic Games, ____its first loop (圈) of green belt around the downtown, ____an area of 102.3 square kilometers, in the past three years.
A.prepared; built; coveredB.preparing; built; and covered
C.which prepares; building; coversD.preparing; built; covering
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◎ 解析
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◎ 知识点
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