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分钟的听说教学方案。教案没有固定格式，但须包含下列要点：
teaching objectives
teaching contents
key and difficult points
major steps and time allocation
activities and justifications
教学时间：20分钟
学生概况：某城镇普通中学八年级第二学期学生，班级人数40人，多数学生已经达到义务教育英语课程标准的相应水平三。学生课堂参与积极性较高。
语言素材：
Helpline: Hello. Friendship Helpline. Who’s calling, please?
Lingling: Hello. This is Lingling speaking.
Helpline: Hi, Lingling! How can I help you?
Lingling: I have a problem with my best friend. She is called...
Helpline: No, don't tell me who she is. Tell me when the problem started.
Lingling: Yes. Well, we’ve been friends for five years. We got separated when we went to different schools last term, but we stayed in touch.
Helpline: So could you explain what happened then?
Lingling: This term, she came to study at my school. I was so happy at first. But she's so different.
Helpline: Can you tell me how she's different?
Lingling: She doesn't like me to see my other friends.
Helpline: Could I ask if you've mentioned this to her?
Lingling: Yes, but she refused to listen.
Helpline: OK, do you know why she treats you like that?
Lingling: No. I don't know.
Helpline: Maybe she doesn't feel very sure of herself in her new school.
Lingling: Maybe.
Helpline: She probably feels lonely without you. I'm sure she regrets hurting you. So be patient with her and explain to her that she can make friends with your other friends too. Try to introduce her to them.
Lingling: I see. I'll encourage her to join in more. Thanks.
Helpline: No problem.
Lingling. You're welcome.
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