单元写作小专题& Section B(3a～3b)

　　【单元写作目标】

　　能描述地球的环境问题、原因及解决问题的建议。

　　1．能用"used to，at present，however"等词来描述当今的环境变化；

　　2．能用"①I think we should...②I suggest that...③We'd better...④We could...⑤It's a good idea to..."等句型来提出解决环境问题的建议。

　　一、语言积累

　　(一)Environmental problems and reasons：根据句意及汉语提示，完成下列句子。

　　1．The river used to be clean，but now the bottom(底部)，of the river is full(充满着) of rubbish(垃圾)．

　　2．People are littering(乱扔) rubbish in the river and factories are pouring(倒入) waste water into the river. That's why the river becomes dirtier and dirtier. As a result，there is no more fish for fishermen(渔民) to catch.

　　3．A lot of industrial(工业的) waste water comes from the factories.

　　4．People use a large number of plastic(塑料) bags every day. People are throwing(扔) those bags everywhere. This turns the beautiful cities into ugly(丑陋的) ones. What's worse，they also pollute the earth.

　　5．The factories that burn coal(煤) pollute the air with a lot of black smoke. The air pollution(污染) is getting worse and worse.

　　6．At present，planes are widely used in our daily life，which，however，makes a lot of noise(噪音)．

　　7．Many animals are endangered because of the cruel(残酷的) hunting.

　　8．We aren't able to see stars in the sky just like before. The problem is that people use too much light(灯光)．And it's also harmful(有害的) to the environment.

　　9．Many things we used may be thrown away and we hardly ever recycle(再利用) them.

　　10．We use nice paper to wrap(包装) the present.Do you think the nice paper is necessary(必要的) or not?

　　(二)以下行为会导致哪些污染，请从方框中里选择合适的选项。

　　A．Air Pollution

　　B．Noise Pollution

　　C．Water Pollution

　　D．Waste Pollution

　　(A)1.black smoke

　　(B)2.the horn(喇叭)

　　(C)3.washing clothes in the river

　　(A)4.smoking cigarettes

　　(D)5.use throw－away chopsticks

　　(三)Solutions：根据句意及首字母或汉语提示，完成下列句子，每空一词。

　　●To cut down air pollution

　　1．I think we shouldn't smoke in public．

　　2．We'd better take the bus or subway instead(代替)of driving.

　　●To cut down water pollution

　　3．Everyone should play a part in cleaning up the river.

　　4．Let's stop factories from pouring waste__water(废水)．

　　5．Don't litter(乱扔) rubbish in the river.

●To cut down waste pollution