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阅读材料，回答问题

材料一：1500年以前，人类基本上生活在彼此隔绝的地区中。……直到1500年前后，各种族集团之间才第一次有了直接的交往……因此，1500年是人类历史上的一个重要转折点。

——美国斯塔夫里阿诺斯《全球通史》

材料二：“1640年革命和1789年革命，并不是……的革命，这是欧洲范围的革命。它们不仅仅是社会中某一阶级对旧政治制度的胜利，它们产生了欧洲社会的新政治制度……这两次革命不仅反映了它们本身发生的地区……的要求，而且在更大得多的程度上反映了当时整个世界的要求。”

——马克思

材料三：“所有正确的或合理的事情都为分离做辩护，被杀死的人的鲜血和造化的啜泣声在喊着：现在是分手的时候了。”

——美国思想家托马斯·潘恩1776年发表的《常识》

阅读理解

    Good morning．Welcome to our school!

    My name is Hou Li，a history teacher.I'm your guide today．Look!Our big playground lies in the middle of the school．On the left of it are two black classroom buildings．There are thirty classrooms in each building．We use computers to help with teaching．It's quick and saves much time．We also put important information on the Internet．so our students can read it at home．Of course,they do their homework on the computers too，just like your students in America．We're going to join an IT lesson at nine o'clock there．

    On the right are three buildings：the office building,the dining hall and the library．The dining hall is orange．Six hundred students can eat in it at a time．Today we are going to have lunch there．The library is a popular place．There are many kinds of magazines and newspapers and hundreds of books for students and teachers．

    Let's have a rest near the office building and then go to the IT lesson．

根据材料内容选择最佳答案。