有個問題係美國

There are several points i have thought of. Hope it could help u

1. Street Art culture
There are many people love to sing and dance hip hop on the street. Some would like to play tricks on weekends.

2. Junk Food culture
USA has a serious obesity problem. The cause is that people have less exercise and eat a lot of junk food. THis is quite a popular subject nowadays. I guess u could write sth on it easily. U may talk about the negative impacts brought by obesity.

3. history of USA
It's once belonged to UK. Something like the English Tea Party and the Indepence Day. How it become a powerful country together with 55 states together.

4.celebrities in Hollywood
U may talk about the blockbusters produced by the USA and briefly mentioned sth about the celebrities.

hope this can help u