KEY FOR READING PASSAGE 1
1. (B) 2. (A) 3. (A) 4. (B) 5. (B) 6. (B) 7. (B) 8. (BJ 9. (C) 10. (C) 11.0 12. (A), (C), (D)
KEY FOR READING PASSAGE 2
KEY FOR READING PASSAGE 3
You can get the detail explanation in this file: TOEFL iBT Reading Test 7 Detailed Solution