The stadium ________ at present in Beijing is for the 2008 Olympic Games．A.builtB.to buildC.to be builtD.being built
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D解析现在分词短语being done做后置定语，表示动作正在进行。比较：The meeting held yesterday(已经举行的)is about terrorism．The meeting being held now(正在举行的)is about economy．The meeting to be held tomorrow(将要举行的)is about Iraq．