15. C - A - B - B - B - C

B - D - C - C

If Phong had enough money, he could travel abroad.

If I drived too close to the animals on safari, the would get scared.

If Tom had a passport, he could travel abroad.

If there were not so many tourists visiting the national parks, the environment there would not be badly damaged.

If tourists did not throw litter in the river, the water would not be polluted.

If I could swim, I would be going scuba-diving with you.

If I had a holiday, I would go on an eco-tour to PQ NP.

If these students worked hard, they could pass the exam.

1 - D          2 - C              3 - F             4 - H               5 - A 

6 - G             7 - B                  8 - E

1. A - B - D - A - B - C - B - D - B - C

1.ecological

2.diversely

3.inspired

4.conservative

5. significant

1. wil be - fly - make           2. will take - don't know                 3. will feel - comes             4. need - will you lend 

5. will be - fail          6. will help - have            7. throw - will eat - die         8. will cause - make - leave

TK:Xà lách kim cương là Cải quý nói lái lại là Quỷ cái vì: Xà lách là cải. Kim cương là quý.

1. Sai

2. Đúng