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课件网) Unit 2 Saving the Earth Topic 3 What can we do at home to protect the environment Section D Learning aims 一、掌握以下单词：remove, replace, dry, insect, bite等。 二、通过阅读了解有关植树造林的困境与解决之法。 三、能够根据不同的阅读目的运用阅读策略获取信息。 四、引导总结连接词but, and, or, while的区别和用法。 Grammar Compound Sentence Recycling can protect the environment, _____ it can save money, too. Some things we have done are good for the earth _____ some are bad. We should do everything to protect it, _____ we’ll be punished and lose our home. Actions can speak, _____ words can't do it . and while or but Grammar 连接词 or, and, but 和 while的用法 连接词 or, and, but 和 while的用法 并 列 连 词 作 用 主 要 连 词 表并列 and（和，而且) as well as(也,和...一样) both…and / not only…but also(不但...而且) neither…nor(即不..也不..) ... 表选择 or (或者;否则) either…or(要么...要么)等 表转折 but（但是) however（然而，可是） while (然而-表对比) not...but(不是...而是)... 表因果 for(由于）because(因为) so(因此）... Exercises ( ) 1. Help others whenever you can, _____ you’ll make the world a nicer place to live in. A. or B. and C. but D. while ( )2. Cross the road carefully, _____ you’ll keep yourself safe. A. so B. or C. but D. and ( ) 3. Hurry up, _____ you’ll be late for the concert . A. or B. so C. but D. and B D A ( ) 4. --Tell us something about Canada, OK -- I’m sorry. _____ Jack ___ I have ever been there. A. Either, or B. Not only, but also C. Both, and D. Neither, nor ( ) 5. I always enjoy visiting London, _____ I wouldn’t like to live there. A. because B. so C. but D. and ( )6. There are many sports lovers in his office. Some love climbing, ____ others enjoy swimming. A. Or B. for C. while D. so ( ) 7. ___ she ___ I know his telephone number, because it has been changed. A. Both; and B. Either; or C. Not only; but also D. Neither; nor D C C D Functions Would you like to be a _____ person First, you ought to _____ the electricity when you leave a room. _____ said than done. Action speak _____ than words. Even German experts think _____ of the technology of China's high-speed train. greener shut off Easier louder highly Trees' functions B. A lot of water can be saved by forests. A. Trees can from blowing the earth away. from washing the earth away. stop the wind C. Trees can stop the water Review Trees can remove _____ from the air and then make _____. carbon dioxide oxygen Trees are the _____ of the earth. The earth cannot breathe _____(with) them. lungs without In order to develop _____(rapid), people cut down _____ number of wood to build houses. lungs a Many volunteers around the world are working to plant new trees. _____, they face many difficulties. However Fast-reading Decide which of the following sentences is true“T”or false“F”. 1a 1. Forests are the hearts of the earth. ( ) 2. In many countries, forests were cut down to make money. ( ) 3. These planters face ... ...
