Here’s a possible way to fill in the blanks in your passage:

The villages surrounding Sa Pa are (1) **home** to several of Vietnam's 54 ethnic minority groups, each with their own distinctive (2) **dress**, customs and dialects. These tribes can all be seen (3) **at** the weekend market in Sa Pa town to trade (4) **with** one another. Apart from its fascinating (5) **diversity**, Sa Pa is also famous (6) **for** its trekking. With Vietnam's highest peak, Mt. Fansipan (3,143m) only 9km away, the (7) **valleys** and mountains (8) **provide** the perfect backdrop for some great treks. Some of the (9) **villages** now have local stays where you can stay overnight with a family in (10) **their** traditional home.