题目内容：
设计任务：请阅读下面的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：
·teaching objectives
·teachingcontents
·key and difficult points
·majorsteps and 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：
Bob: Hi,Carol, How was your school trip yesterday?
Carol:It was great!
Bob: Didyou go to the zoo?
Carol:No, I didn't. I went to a farm. Look, here are my photos.
Bob: Didyou see any cows?
Carol:Yes, I did. I saw quite a lot.
Bob: Didyou ride a horse?
Carol:No, I didn't. But I milked a cow.
Bob: Didyou feed any chickens?
Carol:Well, I saw some chickens but I didn't feed them.
Bob:What else did you do?
Carol:My friends and I went for a walk around the farm and talked with a farmer.
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