题目内容
6．Oct.1st， is our National Day，is always celebrated with singing and dancig．（ ）| A． | as | B． | that | C． | when | D． | which |
分析 十月一号是我们的国庆节，人们总会载歌载舞来庆祝．
解答 答案：D 题干中is our National Day是修饰Oct.1st的一个非限制性定语从句；从句缺少主语，要用关系代词；as表示比较，that不能用于非限制性定语从句中；句意表达的是事实．故选D．
点评 定语从句是用来修饰名词的形容词性从句，相当于一个形容词．连接定语从句的引导词分为关系代词和关系副词，关系代词在从句中要作主语或宾语；关系副词在从句中作状语．这也是选择关系词的一个判断方法．
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