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 nosi e 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 lar’gest
producer and user of coal. as a result, air pollution has become a serious problem.
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