Talk about cell-phone.You may say something abou

It is known to us all,the Cellphone is very widely used,especially by teenagers who live the life “on the go”.They think it is a useful tool for our daily life,so they want to have one.
Many students think if they have a Cellphone,they can keep in touch with their families and friends.They think owing a Cellphone is good for their life.Some parents also share the same idea.(这个是优点）
However,some people don’t agree that students should bring Cellphones to school.First,they think it is bad for the students’ health to use Cellphones.Second,it will add burden to parents because students usually depend on their parents.Third,if students use Cellphones in school,they may not keep their minds on their studies.They may spend most of their time sending text messages or playing games.（写的缺点）
In my opinion,I think owing a Cellphone is not a bad thing.However,we should use the Cellphones at the right moment.In class,we should make full use of our time to study.Do not use Cellphones in class to interrupt others.If in emergency,it is not a bad choice to use Cellphones.
你可以直接拿这个上讲台说的.口语课嘛,没问题的