Informal e-mail

Dear Mark,

I a o glad to hear from you.

I hope you are ok!

I a reading your letter and when I realized the reason why you had written me, I was so happy!

But, sadly, I can’t accept your invitation because now, my personal situation is very stressful.

The reason is related to my high school research project. I’m talking about a very important thing, you know! It’s a project that means a 10 per cent of my final mark. I know that the option which I choose will be the best for me. If I come, I won’t work.

I hope that you can understand me!

Cow I can’t come but I promise you that we eill see each other very soon.

See you soon Mark,

-A