unit 2 topic 2 (section a)
english proverb：practice makes perfect. 熟能生巧。
classgroupname
daydateweather
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学习目标】learning aims and demands.
1.学习新单词和一些短语。
as a result, beh**ior, in the beginning, day by day, die out
2.学习重点：现在完成时的用法。
1)as a result, air pollution has become a serious problem.
2)humans h**e come to realize the importance of protecting animals..
3.学习难点：不定代词的用法。
(1) none of us likes pollution.
2) don’t spit anywhere in public.
(3) everyone should care for wild animals and plant more trees：
预习导学】preparing for lessons before class.
一。 读1a，回答1b的问题。
二。 在文中找到并划出下面的短语。
1.世界上最大的煤炭生产国和消费国。
2.（作为）结果，因此3.一些有用的措施。
4.（我们中）没有人5.到处丢垃圾。
6.当众吐痰7.踩踏草坪。
8.采摘花朵9.关爱野生动物。
10.给**提建议11.发出很大的噪音。
12.更差的是13.制定规章制度。
14.遵守规章制度(215.一天天，逐日。
16.迅速消失17.完全灭亡， 灭绝。
18.过着安静的生活 to realize
20.保护动物的重要性21.破坏环境。
基础知识】basic knowledge.
self-study. (独学)
]： 认真阅读1a,找出重点和难点并用双色笔作出记号。
② 1b, listen to the tape, then answer the following questions.
● pairwork and groupwork (对学与群学)
] ①组内讨论重点内容，记好笔记并质疑。
find out the key words to repeat the passage 1a .
.组内核对1b的答案。
组内讨论完成2和3.
深入**】further learning
1..even worse, some of them are quite rude when talking to others.
译。点拨：when talking to others = when (they are )talking to others 是一个省略句； 在when, while 引导的时间状语从句中，如果从句的主语和主句的主语一致且从句的谓语含有be动词的某种形式，可同时省略从句的主语和be
练习：1)过马路时一定要小心。 do be careful when/while
2)走在回家的路上我遇见了她。when/whilei met her.
2..everyone knows their beh**ior is bad, but none of us knows how to stop them.
译。点拨：how to stop them在句中作knows的宾语。
疑问代词who, what, which等和疑问副词when, where, how等后面跟不定式，构成不定式短语。在句中可作主语、宾语、表语、宾语补足语等。作主语时，谓语用单数。
练习：1)到**去还是个问题still a question. 作___语。
2)问题是怎样学好英语。the question islearn english well. 作___语。
3)他会建议你们如何处理这件事。he will advise youit. 作___语。
4)我不知道下一步做什么。i don’t knownext. 作___语。
当堂反馈】feedback.
单项选择。 ) leaders h**e done everything they can --people’s livingconditions.
a,improving b,improved c,to improve d,improves
)2.--how many students are there at school on sunday ?
a,none b,no one c, anybody d, someone
)3,--is difficult if you set your mind on it .
a,nothing b, everything c anything d something
) fang isn’t here .she has gonefor holidays.
a, somewhere b ,where c,anywhere d. everywhere
) better not read today’s news***** because there is in it .
interesting special thing new
)6. more and more animals are because of all kinds of pollution .
out down off away
) what you think.
care about care about care for care for
)8.—what a terrible sandstorm ！we’d better not go out.
causes it?
often
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