一.Read the text and answer the questions 1.What is the gift for the future? 2 What do you think of the development in the past? 3. Compared to the development in the past, what are the advantages of sustainable development? 4. Why should we put sustainable development into practice? 三.重点词组 1. 在未来数十年中 2. 敲响警钟 3. 污染环境 4. 浪费自然资源 5.一个可能解决方案 6. 可持续发展