Period 5: Cultural Corner
学习目标：
1. 了解人们对未来世界的种种预测
2. 树立跨文化交际意识
3. 掌握重点句子的用法
学习重点：
了解人们对未来世界的种种预测
学习难点：
掌握重点句子的用法
课前预习
使用说明与学法指导：
1. 树立跨文化交际意识
2. 15分钟之内完成
教材助读：
Glass Recycling
Glass has the least volatile pricing of all the post consumer recycling commodities. Composed of sand and potash; bottle glass is made from readily available and inexpensive raw materials. To be competitive, recycled glass must maintain a price that competes with these abundant raw materials. Traded as flint (clear), amber (brown),
