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T: What did you do last weekend?
T: I went around our city and took some photos. Do you want to see them?
Free talk.
T: How is our city? (Learn: clean make the air clean)
T: The city is so clean and beautiful. We should …
(Learn the title: Keep our city clean)
Look and say: Is their city clean?
T: Just now we talked about my city. Miss Li and her students are talking about their city, too.
(Learn: dirty, messy )
Activity Two Presentation
1.Watch and find.
T: What questions does Miss Li ask? Let’s watch and find.
(Ss watch the video)
T: A bit difficult for you. Now open your books at P58. Let’s listen and underline two questions beginning with ‘what’.
(Learn: What makes… dirty? What can we do to keep our city clean?)
2. Read and choose: Read page 58, then try to choose .
Tips: 尝试跟着以下步骤完成哦！
（1）自主学习：自读P58，圈出关键词，完成选择题
（2）小组合作：讨论答案，互学生词，说出关键句
（3）汇报展示（同桌一问一答进行汇报）
T: What makes our city dirty? Please read this part and choose.
(Work in groups, find the key words: smoke from cars &black smoke from factories air, rubbish the streets , the river )
(Learn: smoke, rubbish, factory, dead )
3. Read and write .
Tips:
自主学习：自读P59，圈出关键词，完成P60
小组合作：讨论答案，互学新单词
汇报展示（组长问，组员每人一句进行汇报）
4.Retell the story.
5.Read the story: work in groups, try to read story in different ways.