各位英语高手，英语作文改错 救急啊！！！在线等！！！

标有数字部分为修改部分

• I'm glad that you 1.(write改为wrote) a letter to me.In your letter,I knew you wanted to buy a cellphone.In my  view,I don't think you 2.（have改为had) better to buy a cellphone.
     Let me tell you some bad effects to use a cellphone.
      3.（To begin with改为at first),you know the cellphones aren't allowed to use at the school.Because it will disturb other people.Next,it takes too much time to send the short message.Maybe it is bad for our studys,What's more,you often receive some bad messages.Last but not least,the charge of the cellhones will 4(be increase改为increase) parents' encomy afford.
     Please think about it.

  修改只是针对某些词的用法，没有针对整篇文章的用词及修饰是否妥当，

  可以自己斟酌润色一下。

write- wrote
have- had
the cellphones- cellphones
to use- to be used
at the school- at school
the short - short
message- messages.
Maybe- Therefore
studys- studies
will be increase--will increase