Here are the suitable words filled in the gaps based on the provided options:

1. Some farmers in the highlands don’t have much land and they use simple **farming** techniques.
2. One special **feature** of a stilt house is that it stands on strong posts, about two or three metres above the ground.
3. Vietnam is considered a multi-ethnic **country**, made up of 54 ethnic groups.
4. Women have to get water from nearby rivers and bring home so that it is available for the whole **family** to use.
5. Visitors can participate in a musical program, folk **games**, and many performances.
6. Dance **festival** is the biggest traditional one of this ethnic minority group.
7. Vietnamese Ethnic Groups’ **Learning** Day is celebrated on April 19 every year.
8. Children in remote areas do not have computers. As a result, they do not benefit from the online **opportunities**.
9. The future economy of Vietnam depends on every child having equal **opportunities** to learn.
10. A lot of students rely on homework papers given by the teachers due to limited access to the **Internet**.

Feel free to ask if you need any more assistance!