Hi,
I've deleted the name and addresss from your first post, because you seem to be telling the world this man's name, and that he is a former heroin addict. I'm not sure if this information is real. If it is, you need to protect people's privacy.
You also say that you are going to give this letter to your teacher. Does that mean that your teacher is a former addict? If so, then again you need to be careful about asking such questions.
*******.
24th January , 2008
Dear Mr. XXXX,
I am doing an English project about heroin, so I would like to know a little bit more about you and what happened when you were an addict.
I hope ou don't mind if I ask you these questions.
How were you exposed to heroin?.
How often did you use it?
How does a man who was an addict overcome this condition?.
I am grateful for your time and effort. I am looking forward to your response.
Sincerely,
xxxxx
Best wishes, Clive