英语三级B级
单选题________ is known to all, Peking University is one of the most famous universities in China.
参考答案：B进入在线模考
本题答案选B。句意：众所周知，北大是中国著名的大学之一。本题考查引导非限制性定语从句的关系代词。as作关系代词引导定语从句时，常位于句首作“正如…、这一点”解，且常和动词know/show等连用用以指代整个主句所表达的内容；另外，当先行词被the same或such等词修饰时，也要用as来引导。it和what不能作关系代词引导定语从句，that不能引导非限制性定语从句。
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