17、Farmers use water in many ways. ________, they use water to grow crops.

16. It’s time we()the lecture because everybody has arrived.

15. The girl is()of a film star.

14. The atmosphere()certain gases mixed together in definite proportions.

13. Tom what did you do with my documents? I have never seen such a()and disorder.

12. The students were all entertained in a Mexican restaurant, at Professor Brian’s().

11. How can be()if he is not()?

10. There’s lots of fruit()the tree. Our little cat is also in the tree.

9. No matter(), the little sisters managed to round the sheep up and drive them back home safely.

8. A sudden noise of a fire-engine made him()to the door.

7. People at the party worried about him because no one was aware()he had gone