Unit 2 Making a difference教材课文及词汇精讲（讲义）--2025-2026学年高中英语外研版（2019）必修第三册

高中英语外研版 必修3 Unit2 语篇1 The Well that Changed the World As a six-year-old Canadian schoolboy,Ryan had trouble believing the words spoken by his teacher that many people in developing African countries couldn't get enough clean water.He looked across the classroom at the drinking fountain.It was very...