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人教版(新教材)高中英语选择性必修第一册 PAGE PAGE 1 单元知识滚动练 Unit 2 复习强化 Ⅰ.单词拼写 1．As we all know，it is vital for us to obey traffic rules. 2．They are determined to resist pressure to change the law. 3．It is difficult for us to predict what’s going on in the near future. 4．Many people advocate building more hospitals