Work in groups. Discuss the questions.
(Bạn nghĩ gì?
Làm việc theo nhóm. Thảo luận các câu hỏi.)
1. Why did the postman have to walk from villaoe to village?
2. Why were most villagers illiterate?
3. Why did the people in Baffin Island use ice bl to build their houses?
4. Why did each house have only one room?