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What makes our city clean and beautiful?
T: Do you like live in the city?Why?
二、聚焦单元主题
T: City is our home.Our city is more and more modren and active,but there are some problems:environmental problems,education problems,medical problems and so on. Look, Miss Li and her students are talking about the problem of the city.What problems are they talking about? Let’s listen and choose.（播放课文前半部分录音）
S1:I like the city,because the buildings are tall.
S2: I like it, it’s beautiful and morden.
S3: I don’t like it. There are too many people and cars.
S4: The park is clean. The water is clean. The buildings are beautiful.
S5:Yes, because we can learn a lot/buy many nice food...
S6:...
Listen and choose
整体感知选出主题充分利用与主题相关的视频资源来激活学生的语言体验，唤醒学生头脑中关于城市的语言储备，也通过互动交流铺垫了相关目标语言，在有意义的交流中激发学生语用动机。
谈论城市话题过渡到城市的问题，继而引出城市的环境问题这一主题，帮助学生在头脑中构建关于城市的立体网络关系图，使学生避免了单性、线性的思维，学生可以通过经验储备和知识不断建构和补充城市环境这一主题。
Step 2
While-reading procedure
(25’)
读导语：The city is not clean.So today our class project is Keep our city clean.（板书课题）
一、引导学生自主提问(Task1)
Lead the students to ask questions about the project.
T:But how to do a project?
PPT呈现做课题的步骤。
Maybe asking questions can help you.Do you have any questions about this topic?（板书出示疑问词）
学生提问时，教师板书提炼关键词。
T：You have so many questions. You wants to know the problems,the suggestions,the results,I think you can have a report at last. （板书呈现思维导图结构）
二、发现问题(Task2)
1,Look and say
T:First, let’s find the problems.Let’s talk about the pictures.
小结(ppt)T:There are so many problems.The river is dirty. The street is dirty. The air is dirty.
Teach the word “dirty”
Watch and match