I have to write a letter. Do you have some paper? ✬

Didn't you write a letter to him? ✬

Are you writing a letter? ✬

This happened prior to receiving your letter. ✬

I received your letter yesterday. ✬

Your letter made me happy. ✬

Here is a letter for you. ✬

Don't forget to mail this letter on your way to school. ✬

Would you mail this letter for me on your way to school? ✬

If it isn't out of your way, please take this letter to the post office. ✬