题目

元朝的大都既是政治中心,又是闻名世界的商业中心口意大利旅行家马可•波罗的《马可•波罗行记》就描述了大都的繁华景象。() 答案:正确 I am especially interested in the lecture you gave us ________ you discussed the mystery surroundings of that particular bird. [  ] A.which B.that C.while D.where
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