Exercise 4: Complete sentences with the correct form of the word.

1. I worry about the ________________ effect that violent films may have on children. (destroy)

2. He discovered new chemical reactions and introduced improved ________________ techniques. (prepare)

3. He admitted his ________________ was inappropriate. (behave)

4. Geologists understand many of the factors that cause ________________ eruptions. (volcano)

5. With dramatic _______________, a decision was taken to close the school for good. (abrupt)

6. This decision will have a ________________ impact on foreign policy. (disaster)

7. The planned ________________ to the motorway near London is going to cost over £4 million. (extend)

8. Breakfast is ________________ in the restaurant between 7.00 and 11.00. (serve)

9. I couldn't hear what he was saying over the ________________ of the waterfall. (thunder)

10. Don't play in the street - it's ________________. (safe)