英语译林牛津版必修5unit2练习(1--1)及答案 unit 2 the environment period one welcome to the unit & reading(ⅰ) 基础落实 ⅰ.课文理解 1.what is the focus of the debate according to the text? a.developing economy is the most important. b.preserving the environment is the most important. c.the relationship