Dear Alice,

Thank you for your letter. It was such a pleasure reading it.

Since you're asking about my ambitions, I should tell you that I see myself as a doctor: I find it exciting to treat people for different illnesses, to make them feel better and praise the doctor's mastership. That's why I'm really keen on Biology and Chemistry -- these subjects would allow me to pass the entrance exams to a medical university. In fact, the mere thought that one day my family should be proud of me, about my career makes me work hard every day towards my goal.

Now that it's getting late I have to go to bed. There's a Latin proverb which goes like 'Per aspera as astra'. Yeah, I must learn Latin to become an eminent doctor, too. Cheers!

Yours,

[you're name]