IX. Read the passage. Answer the question below.

1. Some predict that the sun’s rays will cause a sharp increase in deaths from skin cancer over the next fifty years.
2.  Oxygen molecules make up about 21% of all gases in the Earth’s atmosphere.
3. Most ozone found in our atmosphere is formed by an interaction between oxygen molecules and ultraviolet radiation (UV) from the sun.
4.  It may cause the molecule to break apart into single atoms of oxygen
5. It is very active.

 X. Rewrite the following sentences based on the given words.

1. If people cared much about environment, they wouldn't keep making it worse.

2. Since she drank contaminated water in a long time, she suffered from a serious disease.

3. If the drainage system wasn't damaged, there would be enough water for the crop.

4. If I were you, I would turn off more lights in the house to reduce your eyestrain.

5. If the public transport system is improved, more people will be encouraged to use it.