I
1. B to take
2. A Tidal waves
3. A know
4. A evidence
5. D effective
6. C skillful
7. B to collect
8. D collecting
9. C carelessness
10. A go
11. D eating
12. B to give
13. A to study
14. D meeting
15. D taking
II
1. tender : mềm
2. preserve : khu bảo tồn - tourists
3. official : chính thức - international : quốc tế
4. have been damaged
5. behavioral
6. take
7. is divided
8. to take
9. were spending her vacation in HL Bay now
10. was doing
11. exported
12. will be polluted