Complete the sentences with a form of the word in brackets.

1. When working in this area, please wear **protective** clothing. 2. Don't pour used chemicals into the drains as they will cause **contamination**. 3. Heating this liquid may cause an **explosion**. 4. These chemicals must be kept in a locked cupboard because they are **harmful**. 5. While they repair the roof, we will close this department as a **precautionary** measure. 6. **Occupational** health is one part of Health and Safety. 7. Working in a noisy factory without ear protectors is a **dangerous** activity. 8. Petrol and oil are **flammable** chemicals. 9. Make sure the containers are closed **tightly**. 10. Make sure you are wearing breathing equipment before starting **fumigation**.