设计任务：请阅读下面学生信息和语言素材，设计20分钟的英语听说教学方案。教案没有固定格式，但须包含下列要点：
● teachingobjectives
● teachingcontents
● key anddifficult points
● major stepsand time allocation
● activitiesand justifications
教学时间：20分钟
学生概况：某城镇普通中学初中一年级第二学期学生，班级人数40人。多数学生已经达到《义务教育英语课程标准(2011年版)》二级水平。学生课堂参与积极性一般。
语言素材：
Conversation 1
Tom: Hey，Peter.
Peter: Hi．Tom.
Tom: How's the weather down there in Shanghai?
Peter: it's cloudy. How's the weather in Moscow?
Tom: It's snowing right now.
Conversation2
Peter: Hi Aunt Sally.
Aunt 8ally: Hello,Peter.
Peter: How's the'weather in Boston?
Aunt Sally: Oh, it's windy.
Conversation 3
Peter: So, how's the weather in Beijing?
Julie:It's sunny.
Conversation 4
Peter: Hi,Uncle Bill.
Uncle Bill: Hello, Peter.
Peter: How's the weather in Toronto?
UncleBill: It's raining, as usual!
/L，N 0．56，L 0．43，M 0．01，PLT 80×10
