Hearing the 2008 Beijing Olympic Games ____ __, all the people in the Bird Nest burst into cheers.A.declared to be openedB.declaring to be openedC.declared openD.declaring open
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C解析考查宾语补足语。the 2008 Beijing Olympic Games与declare是被动关系，故使用过去分词的修饰。Declare the 2008 Beijing Olympic Games open中的open是形容词单独使用做宾语补足语。故C正确。