Here’s a suggestion for filling in the blanks:

1. **ended**
2. **excited**
3. **calm**
4. **roadside**
5. **arrived**

So the completed text would read:

"The Robinsons had a great holiday in Nha Trang. Unfortunately, the holiday soon **ended** and it was time to return home. They took a bus back to Hanoi. Liz was **excited** as the bus drove through the countryside. She saw rice paddies for the first time. Everything looked **calm** and peaceful. At four o’clock, the bus stopped at a small **roadside** restaurant for ten minutes. Mr Robinson was asleep, so Mrs Robinson bought some peanuts and an ice cream for Liz. The bus **arrived** in Hanoi at..."