Listening Quiz: Thích Nghi Độ Cao Cho Chuyến Trekking Machu Picchu – Medium Level

1. What is the main topic of the conversation?
2. How long should John spend at 2,500 meters?
3. According to Laura, how much should altitude be increased daily after acclimatising?
4. Why does Laura tell John to climb slowly?
5. What should John do if his symptoms get worse?

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