topic 2 all these problems are very serious. section a
上课教师：刘丽娟。
the main activities are 1a and 2. 本课重点活动是1a和2。
. teaching aims and demands 教学目标。
1. learn a new word and some phrases:
as a result, beh**ior, in the beginning, day by day, die out
2. learn some useful sentences:
(1)as a result, air pollution has become a serious problem.
(2)humans h**e come to realize the importance of protecting animals.
3. learn the indefinite pronoun and adverb:
1) none of us likes pollution.
2) don’t spit anywhere in public.
3) everyone should care for wild animals and plant more trees.
4. learn the importance of protecting the environment.
. teaching aids 教具。
有关污染的和学生不文明行为的教学**/小黑板/录音机/警示标语。
. five-finger teaching plan 五指教学方案。
step 1 review 第一步复习(时间：7分钟)
复习污染的类型及其危害，教师创设一个空气污染的情境，引入本课话题。
1. (教师收集一些有关污染的**，让学生说出它们分别属于哪种污染，有何危害并提出解决建议。)
t: what kind of pollution is it?
ss: it is noise pollution.
t: what harm can it cause?
s1: it can disturb others and make people feel uncomfortable and unpleasant.
s2: it does great harm to people’s hearing. it can even make people sick or deaf.
t: good. how should we solve this problem?
s3: don’t always listen to loud pop music.
s4: don’t make a loud noise in public.
其它污染用同样的方法复习。学生可以在教师帮助下回答。)
step 2 presentation 第二步呈现(时间：10分钟)
展示1a的**，导入新课，呈现本课生词和词组。讲解不定代词和不定副词的用法。教育学生必须保护环境。
教师创设一个空气污染的情境，引入本课话题。例如：教师一边拍身上的灰尘，一边咳嗽着走进教室，然后描述。)
t: it is too dirty and there is too much he**y smoke outside. i can’t stand it.
1. (教师展示1a的**，导入新课。)
t: do you like the environment here?
ss: no, we don’t.
t: why?
ss: because there is too much smoke. it’s a serious air pollution.
t: very good. we should stop burning coal.
it is said that china has become the world’s largest producer and user of coal. as a result, air pollution has become a serious problem.
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