Unit 2 Grammar and usage 课件-2022-2023学年高中英语牛津译林版（2020）选修第二册

Unit 2 Building the future Grammar and composition The elements of a paragraph By the end of this lesson, students will be able to 1. identify the elements of a paragraph 2. work out the rules of the elements of a paragraph 3. use the elements of a paragraph to finish the given tasks 4. develop their sense of social responsibility to reduce different kinds of pollution Read the article on Page 20 and fill in the blanks of the table below. Lead-in Paragraphs Main idea Para. 1 (1) ______________ to white pollution Paras. 2‒3 (2) ____________________ (3) ______________ Para. 4 Conclusion Introduction Threats to the natural environment Threats to all living things Find the answer to the following questions Why are Mount Qomolangma and the Mariana Trench mentioned in the first paragraph? How does white pollution cause long-term damage to the environment? Are all living things negatively affected by white pollution? List some specific examples to support your opinion. Why are Mount Qomolangma and the Mariana Trench mentioned in the first paragraph? They are mentioned to emphasize that white pollution is a widespread problem, which is the topic of the passage. How does white pollution cause long-term damage to the environment? Firstly, because plastic…..huge amount…..small….recycled, billions of tons of it ……left lying…. Secondly, …long time….to decompose…..during…….releases ..chemicals…… soil, water ….do harm to…..properties and …quality Are all living things negatively affected by white pollution? List some specific examples to support your opinion. Yes, no living thing……safe from…… plant …..affected…chemicals. Also, animals…illnesses….. Moreover, ……travels through….chain…humans come down with…. conclusion Cooperation and participation from all sectors of society should be required to tackle the problem. White pollution is a widespread problem. white pollution poses serious threats to the environment. Firstly, because plastic is produced in a huge