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能运用所学词句复述或表演课文章节
教学过程：
Step 1 Lead-in
1.Enjoy some pictures about our city.It’s a clean and beautiful city.
So,we should keep our city clean. (揭题)
2.Try to say “keep”
Step 2 presentation and practice
1.创设情境，文明城市创建在行动，你想参加吗？出示要求：
（1）Know what makes our air dirty.
（2）What can we do to keep our city clean?
（3）Finish the proposal
2.Watch and choose
（1） How is the city?
The city is beautiful and clean.
（2）What makes our city dirty?
A.clouds and water B.smoke and rubbish
3.Read and find. (快速阅读P58，完成下面的填空)
What makes … dirty?_____from cars and ______ from _______
make(s)
the air
dirtythe streets
______ in the _____
the river3.Read and write.(快速阅读P59，完成P60 Think and write.)
Our city is not clean now. What can we do to keep our city clean?
● We can take and to school.
● We can also school.
● We can move some away from our city.
● We can put in the bin.
● We can plant more .
4.Read after the tape.(模仿语音语调，尤其是新单词的读音)