跪求一篇英语小作文，很急啊~，大约120字左右

Dear Tom:
Happy to receive your letter!I have known that you want to raise a dog,but your mother didn't allow you to do that.I have very mercy on you.In my opinion,your mother is right.On one hand,it takes a lot of time and money to raise a dog.It maybe waste your study time and your grade will decrease.On the other hand,the dog can spreed disease.It is dangerous,if you are bited by a dog.In addition to,the dog perhaps threten your neighbour's safty and it's barking will make them broing.I think your city which you live maybe have a Pet Center,you can go there to play with them,but you must pay attention to your safty.I'm glad to hear your news.
Yours
XXX

Dear Tom,
From your letter,I know you like the dogs very much and want to have one.But your mother doesn't allow you to have a pet. She might think it is