Dear...,
I would like to talk about my favorite sport, which is football, the king of sport to everyone in Vietnam.I first knew about it when I was 15 years old. It was my classmates who invited me to join his football club with other friends in his neighborhood. I had a great time with them, for sure. I used to play it after school with my friends as it was the only free time I have for the whole day. Nowadays I am pretty busy with my work and study so I had to give up the hobby. But sometimes if I have a long holiday I will arrange a small football match with my old classmates. Those football matches often end with us being in a small restaurant where we drink and chit-chat. I love this sport for several reasons: First, it helps to improve my physical and mental health. Second, I can also learn teamwork skills which are crucial in all aspects of life. Last but not least, since I started playing this sport, I have made a lot of friends who are now my best playmates. 
End.