Unit13We’retryingtosavetheearthSectionA1介绍.ppt

stop riding in cars stop using paper towels or napkins n. 餐巾, 餐巾纸 recycle books and paper v. 回收利用; 再利用 2d Read 2d and complete the chart. waste pollution air pollution Ways to solve the problem Pollution take the bus, subway or ride a bike instead of driving bring a bag to go shopping never take wooden(木头的) chopsticks or plastic forks when buying takeaway food throw rubbish in the bins Jason and Susan, what are your ideas for solving these problems? Yeah, or ride a bike. There are other advantages (优点) of bike riding. It’s good for health and it doesn’t cost (花费) anything! Well, to cut down air pollution, we should take the bus or subway instead of driving. Great ideas! What about waste pollution? Me, too. Also, I never take wooden chopsticks or plastic (塑料) forks when I buy takeaway (外卖食物) food. I use the ones at home. Mmm, I think simple things like bringing a bag to go shopping can help. I started doing that a year ago. And remember to throw rubbish in the bins and keep public places clean and beautiful for everyone. So together, our actions can make a difference and lead to a better future! 1. It’s good for health and it doesn’t cost anything! cost v. 花费；使付出 指花费金钱，主语通常是物。cost的过去式和过去分词均为cost。 e.g. The new shirt cost Mr Wang 200 yuan. 王先生花了200元买了新衬衫。 How much does the new computer cost? 新电脑花了多少钱？ take, spend, pay cost take，spend，pay和cost都可以表示“花 费”，但它们的用法各有不同。 1) take多表示花费时间，常用于it takes sb. some time to do sth.这一句型中，其中it作形式主语。 e.g. It usually takes me 40 minutes to cook the dinner. 2) spend多表示花费时间和金钱，主语通常是人，常用于sb. spend(s) some time / money on sth.和sb. spend(s) some time / money (in) doing sth.两种句型。 e.g. David spent 2,000 yuan on the new machine. My father spends an hour (in) reading the newspaper every day. * The earth is polluted. air pollution The factories that burn coal pollute the air with a lot of black smoke. n. 煤炭 Factories put waste into the river. water pollution mo