根据提供的信息和语言素材设计教学方案，用英文作答。 设计任务：请阅读下面学生信息和语言素材，设计20分钟的阅读教学方案。教案没有固定格式，但须包含以下要点： l Teaching objectives l Teaching contents l Key and difficult points l Major steps and time allocation l Activities and justifications 教学时间：20分钟 学生概况：某城镇普通高中一年级第一学期学生，班级人数40人。多数学生已经达到《普通高中英语课程标准（实验）》五级水平。学生课堂参与积极性一般。 语言素材： In some countries in western Europe, such as France, Belgium and Britain, the countryside is changing. Life has become difficult for many villages, and some disappearing. There are a number of reasons for this. Firstly, young people from villages usually want to live somewhere livelier and they often move to the towns and do not return. Secondly, people move to the cities to find work, as there are often very few jobs in the countryside. Sometimes villages remain because people from the cities have bought a second home in the village, where they come and stay at weekends. The prices of houses go up and people from the area cannot afford to buy a house there. Another problem is that it is becoming more and more difficult for farmers to make money from the farms. So they sell their land and find another job. All these things mean that many villages in western Europe are fighting to survive. We can only hope that they will remain. The countryside would be a sadder and uglier place without them.
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