1. The exercise was very long. I thought it was …… endless.
2. I thought the …… were better than the text. Illustrations
3. The …… of her voice calmed the old lady. softness
4. John is a very …… driver. I don’t like to travel with him in the car.
careless
5. I ……think that the new project is rather difficult. personally
6. What is the ……. Of this area? population
7. People should do more for the …… of the environment. protection