Fill the gaps in the sentences. Use words from A and B opposite.

1) Tropical...climatesare hot and humid.
2) The heavy snowfall may...prevent..us from going out.
3) Bringing up children is a difficult...task
4) Globalwarming...affects the sea level.
5) That scientists is an...experton fossil fuels.
6) Something has to be done before more animals and plants become..extinct..
7) Cars ..release... fumes and pillute the atmosphere.
8) He promised to come but then he..changed...his mind.
9) We can all ..makea difference to the environment.
10) Gorillas are an...endangeredspecies.

1. Potatoes were bought yesterday.
2. The books will be brought tomorrow.
3. The clock is being repaired now.
4. Milk is sold in this shop.
5. The whole text has been translated by me.
6. The window was broken last week.
7. When I came home the sweets had been eaten.
8. The work will be done in the evening.
9. This book was written in the 19th century.
10. Tennis was being played from four till five.
11. A lot of money was stolen from the shop by him.
12. By six o'clock the work had been finished.
13. At twelve o'clock the trucks were being loaded by the workers.
14. By three o'clock the trucks had been loaded by the workers.
15. Our daughter is sent to rest in the south every year.
16. This film will be shown on TV.
17. A new concert-hall is being built in our street.
18. A number of important experiments have been made in this laboratory.
19. Central Africa was explored by Livingstone in the 19th century.
20. By the middle of autumn all the trees had been planted.
21. This play will be staged at the beginning of next season.
22. The story has been forgotten by them.
23. Have you been explained the rules of the game by anyone?
24. My skates haven't been brought back.