Here are the answers based on the provided text:

1. **What are the two differences between Henry and Greg?**
- Henry is described as an introvert who enjoys indoor activities, while Greg is the opposite, being extroverted and active in outdoor activities.

2. **What does the phrase "His presence is hardly noticed" in paragraph 2 mean?**
- It means that Greg is very quiet and does not draw much attention to himself.

3. **Why isn’t Henry annoyed or angry when people say that he is talkative?**
- Henry is not bothered by this comment because he appreciates his own personality traits and does not feel the need to change.

4. **Pick out a set of opposite words from the second paragraph.**
- "Quiet" and "talkative."

5. **Who do you think will enjoy doing handicraft at home?**
- It is likely that Henry might enjoy it since he prefers indoor activities, but this is subjective and could depend on personal interest.