6. If you destroy your health, you have nothing left.

7. Walking on the beach, she could feel the warm sand beneath her feet.

8. He threw away the remains of a meal in the trash.

9. Would you like to attend the lecture (讲座) about the current affairs?

10. I think cinema will gradually (逐渐) be replaced by TVs and computers in the next century.

11. Many of the people have fled (逃) to the mountains to escape the floods.

12. It is dangerous to smoke when handling explosive materials (材料).