Sure! Here are the answers based on the passage provided:

6. **What was the traditional method of sending messages in the past, according to the text?**
- **B. Handwritten letters**

7. **What is mentioned as a significant aspect of writing letters in the past?**
- **C. personal connection**

A. Speed and convenience
B. Time and patience

**What does the word integral probably mean?**
- **A. necessary**

9. **According to the text, why do some people still prefer writing letters by hand?**
- **C. It shows the writer's feelings**

10. **What is emphasized as unchanged in Vietnamese culture despite technological advancements?**
- **A. Postal service**

If you need help with anything else, feel free to ask!