1. Choose the word or phrase among A, B, C or D that best fits the blank space in the following passage.

Tropical forests have ⁴⁶ ___________ us with very many sorts of plants for food, ⁴⁷ ___________ and industry. They could probably supply man more. They also reduce ⁴⁸ ___________ and droughts, keep water clean, and slow down the Greenhouse Effect, ⁴⁹ ___________ the tropical forests are                            ⁵⁰ ___________ destroyed to make ⁵¹ ___________ for things like farms, ranches, mines and hydroelectric ⁵² ___________. About 20 million hectares are lost each year - an area more than twice the size of Austria. The World Wildlife Fund is working to ⁵³ ___________ and save the forests that are ⁵⁴ ___________ danger; to plant new trees for fuel wood and to slow down the Greenhouse Effect; and to ⁵⁵ ______ governments to think about the forests and their importance when giving international aid.

1. A. given B. brought C. supplied                D. donated
2. A. medicine B. hospitals C. doctors                  D. surgeons
3. A. deserts B. floods C. heat                       D. hazards
4. A. so B. for C. because                D. but
5. A. have B. been C. being                     D. be
6. A. room B. rooms C. place                     D. places
7. A. sources B. energy C. dams                     D. cables
8. A. keep B. protect C. maintain               D. hold
9. A. at B. within C. on                          D. in
10. A. make B. let C. encourage            D. influence