◎ 题干
China's sport stars Yao Ming and Liu Xiang _________ Goodwill Ambassadors (亲善大使) for            Shanghai.      
[     ]
A. has been named
B. have been named
C. has named
D. have named
◎ 答案
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◎ 解析
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◎ 知识点
    根据n多题专家分析,试题“China's sport stars Yao Ming and Liu Xiang _________ Goodwill Ambassadors (亲善大使) for Shanghai.[ ]A. has been namedB. have been namedC. has namedD. have…”主要考查了你对  【被动语态】【现在完成时】  等知识点的理解和应用能力。关于这些知识点的“档案”,你可以点击相应的链接进行查看和学习。