28 Pollution fighters（二）B4.pptVIP

Cards·重点小卡片 n. item 一件物品 product 产品 gas 气体 fighter 斗士；战士 fact 事实 scientist 科学家 notebook 笔记本 oxygen 氧；氧气 hectare 公顷 chemical 化学物质；化学品 nature 自然界;大自然 lorry 卡车 v. produce 产生；生产 suppose （根据所知）认为，推断，料想 breathe 呼吸 release 释放；放出 warn 使警惕；警告 protect 保护 communicate 沟通；交流信息 join 连接；加入 burn （使）烧毁，烧死 replace 替换；取代 destroy 摧毁；毁灭 exchange 交流 adj. average 平均的 interested 感兴趣的 pure 纯净的 alive 活着；在世 natural 自然的；天然的 nasty 令人厌恶的；令人不悦的 main 主要的；最重要的 adv. hardly 几乎不 belong to 属于 as well as 也；还 one another 互相 communicate with 与……交流 in danger 处在危险中 1. Why are you so interested in trees, Doctor Ray? 雷博士，您为什么对树如此感兴趣呢？ 2. Yes, but what good are trees? 是的，但是树木的好处是什么？ 3. Trees cool the air as well as clean it. 树木除了净化空气外，还能使空气变得凉快。 4. We are destroying our best fighters against pollution. 我们正在摧毁最好的环保卫士。 Exercise·基础练习 I. 单词拼写 根据汉语提示写单词，完成句子。 1. Everyone enjoys________(呼吸) the clean and fresh air. 2. How many trees are there in a forest of 100 ______ (公顷)? breathing hectares 3. Farmers pollute the fields with different _________ (化学物质) that they don’t know. 4. The air in the countryside is ______ (纯净) than that in the city. 5. After several______ (打斗), the little dog hides away when it sees the big cat. chemicals purer fights Ⅱ. 单项选择 从A, B, C, D中选出可以填入空白处的最佳选项并将其字母序号填入题前的括号内。 ( )1. — We should do something for the two homeless dogs that are ____. — Let’s call the SPCA. A. at the trouble B. in danger C. at danger D. at trouble ( )2. — Why don’t you travel to Tibet? — Because I am not strong enough and I can hardly take enough ____ there. A. trees B. flowers C. grass D. oxygen ( )3. — What can Jim do on his computer? — Many things. He can do his homework ____ play computer games. A. but B. so C. as well as D. then ( )4. It takes me