列出三段就行了.
第一段,写teachers and students can be friend,然后就写为什么能成为朋友.(teacher helps student's dailylife and study,they keep close relationship with each other)
第二段,写teachers and students can't be friend,列出原因.(teacher teaches student how to study,they should be strict,or the students won't obey their teacher.
第三段,写出自己的观点.