Unit 2 Arnwick was a city with 200000 people
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导学目标：
1. 掌握并正确运用下列单词和词组：flat, rubbish, quiet, local, close down, pupil, pollution, public, service, save
2.运用所学知识对城市问题提出解决问题的建议。
自主预习：
一、根据句意和首字母提示完成单词。
1. All of u s should put r__________ into dustbin (垃圾箱) to protect the environment.
2. You have a cold, so you must keep q____________ at home.
3. This is a big city with a p_____________of over two million.
4. I think the houses are more convenient(方便) than the f___________.
5. Thanksgiving is a p___________ holiday in the un ited states.
6. He works in the l__________ hospital.
