1. The most serious problem in Hanoi is Traffic lights
2. Because there are a lot of people living in Hanoi so the city is crowded with people and the traffic is so bad
3. Yes, I do. Besides of the disadvantages, there are lots of advanteages to live in Hanoi
4. I like going and playing in the park most. Because the air there is so good
5. I like the people there, restaurant, ... and lots of things there!
