1. Our polluted planet Chapter 3 Book 6A Longman Welcome to English

2. Please don’t keep( 保持 ) the engine( 引擎 ) ______( 发动 ) when you are not ______. If( 如果 ) we keep on( 继续 ) _______( 造成 ) air pollution, we _____ have any fresh air to breathe. running driving causing won't keep doing sth. keep on doing sth. 保持做某事 继续做某事

3. Please ____ dump( 倾倒 ) things in the countryside( 乡村、郊外 ). ____ we keep on _______ land pollution, plants and animals ____ die( 死亡 ). don't If causing will

4. It's raining outside, just keep (on) reading in the classroom. I kept (on) doing my homework for 3 hours last weekend. Everyday I keep(on) cleaning my teeth after lunch. I kept (on) waiting for him for two hours yesterday. Make sentences with "keep/keep on": 1 、我坚持每天午餐后刷牙。 2 、上周末我连续做了 3 个小时的作业。 3 、昨天我连续等了他两个小时。 4 、外面下雨，就呆在教室里阅读吧。

5. Give up smoking. 戒烟。 Turn down your TV. 关小电视声音。 Throw rubbish in the bin. 将垃圾扔进垃圾箱。

6. Don't throw rubbish in the rivers or the sea. 不要将垃圾扔到河里或海里。 Don't dump things in the countryside. 不要将垃圾扔到乡村 / 郊外。 Don't keep the enginee running when you are not driving. 当车子未开动时不要发动引擎。

7. If we keep on causing air pollution, we won’t have any fresh air( 新鲜空气 ) to breathe( 呼吸 ).

8. If we keep on causing land pollution, plants and animals will die ( 死亡）.

9. If we keep on causing water pollution, we won’t have clean water to drink. Sea animals will die.

10. If we keep on causing noise pollution, we won’t have a quiet place to live in （一个安静的地方居住）.

11. 1. ____we keep on _________ air pollution, we won’t have any fresh air to breathe. 2. If we ________ causing land pollution, plants and animals will die. 3. If we keep on causing water pollution, we____________________________. Sea animals will die. 4. If we keep on causing ______________, we won’t have a quiet place to live in. If causing keep on won’t have clean water to drink noise pollution Fill in the blanks.