一、用单词的正确形式填空。
1. There is too much (暴力) on TV.
2. There is a relaxing a________ in the classroom.
3. The river is so polluted that every day we can see a lot of things f_______ on the water.
4. The illness is s through the village.
5. One cannot e without air.
6. As is known to all, smoking is h_______ to our health.
7. By the time they reached the top of the mountain, they were (精疲力尽).
8. This maths problem p_____ me.
9. Zhang H eng was one of the most famous Chinese a in the world.
10. The mammals (繁殖) when the animals, harmful to them, disappeared.
二. 翻译下面短语 (15 分)
1．密切注意，提防______________ 2．及时，总有一天______________
