Here are the sentences completed with the appropriate verbs in their correct forms:

1. The villagers are working together **to build** the rong house.
2. Our small stilt house **faces** a large terraced rice field.
3. In my village, the farmers still use buffaloes to **plough** the fields.
4. Most minority groups hold a festival after they have **harvested** the crops.
5. The children help do housework like cooking or **feeding** the poultry.

Feel free to ask if you need further assistance!