上外版（2020）选择性必修第三册Unit 4 Protecting the Environment：Reading A 学案（学生版+教师版）

2C Unit 4 The Vilain in the Atmosphere 《高中英语》（上外版）选择性必修三 第四单元 第 2 课时 学案（教师版） I. Warm-up Interactive Task 1: Review the main idea and organization of Reading A. Q1:What is the theme of the text The writer describes the functions of small quality of carbon dioxide, harmful effects of carbon dioxide, and the causes of these consequences to make the public aware of the serious results of global warming. Q2: What is the organization of the text II. Language Focus Interactive Task 2: Review and analyse the functions of small quantity of carbon dioxide in Para. 2-3 . Q1: Can you identity the connector that links the two functions of carbon dioxide in Para. 2-3 What’s more. 1) what’s more to add more information that emphasizes what you are saying 更为甚者：更为重要的是 空气中少量的二氧化碳对我们没有害处，更为重要的是它对生命很重要。(what’s more) A small quality of carbon dioxide in the air does us no harm, and what’s more it is essential to life. Q2: How do plants produce “food” Plants absorb carbon dioxide and convert it into their own tissue, which serve as the basic food supply for all 1 / 6 2C Unit 4 The Vilain in the Atmosphere of animal life (including human beings, of course). 2) absorb / b s :b / vt. to take in liquid, gas, or another substancefrom the surface or space around something 吸收（液体、气体等） absorb heat/carbon dioxide/water/knowledge sb. be absorbed in one’s work absorption / b s : p n / noun absorbent / b s : b nt / adjective Choose the word and phrases mentioned above and fill in the blanks in proper forms. 1. The scientists their work on plants ’ of carbon dioxide. 2. To sell recognized that these qualities might make it useful as an material for removing carbon dioxide. 1. are absorbed in ; absorption 2. absorbent Q3: Could you list the words and expressions related to the function of CO2 in Para. 2-3 ( do no harm )Be converted into their own tissue functions be absorbed by plants serve as the basic food release oxygen Interactive Task 3: Review and analyse the harmful effects of CO2 in Para. 4-6. Q1: Why is this apparently harmless and certainly essential gas harmful to us The sea level is rising very slowly and in all likelihood , it will continue to rise and do so at a greater rate in the course of the next hundred years. 3) likelihood / la klih d/ n. the chance of sth happening; how likely sth is to happen 可能； 可能性 adj. & adv. likely sb./sth. be likely to do sth. It’s likely that... e.g. In all likelihood, the sea level will continue to rise and do so at a greater rate in the course of the next hundred years. = The sea level will be likely to continue to rise and do so at a greater rate in the course of the next hundred years. 2 / 6 2C Unit 4 The Vilain in the Atmosphere = _It’s likely that_the sea level will continue to rise and do so at a greater rate in the course of the next hundred years. 随着海平面的每年上升，许多城市很可能被淹没，引起了世界上很多耕地丢失。 As the sea lev ... ...