1. We haven't met for a long time.

2. Because Long studied hard, he passed the exam.

3. I am a member of the anti-pollution program in my school, so I often go to school by bus?

4. How long have you bought this dictionary?

5. The accident made me late.

6. I haven't had such a delicious meal before.

7. She failed the University entrance exam due to her bad grades.

8. Phong's laziness leads to a lot of bad marks.

9. The polluted water results in many fish's death.

10. The polluted water caused the fish's death.