Here are the likely words to fill in the blanks:

1. place
2. clear
3. traditional
4. exciting
5. choice

So the completed text would read:

"In Vietnam, a market is a trading (1) **place**, but many markets are not (2) **clear** about buying and selling things. They reflect the life of the community. A (3) **traditional** market is a social gathering point for people of all ages; it is a new and (4) **exciting** experience for children, a trading place for local craftsmen, and a (5) **choice** for young people to meet."