根据中文提示、句意和英文解释写出句中所缺单词。
1. About 80% of these cases of blindness can be _______(治愈) or prevented .
2. These blind people are _______(主要) in the poor areas .
3. We students can't _______ (have enough money to do) to travel around the world .
4. I think _______ (educate) is so important that each child should go to school .
5. We're so hungry and tired that we cant' any _______ (far) .
6. The old man can't cross the road alone because of his _______ (blind) .
7. If she _______ (catch) the early bus , she'll go there on time .
8. How long _______ you _______ (be) in this city ? since 1990 .
9. When _______ UNICEF _______ (set) up? In 1946 .
10. The children from disaster areas (灾区) should be treated with _______ (kind) .
11. He teaches them about _______ (perform) eye operations and other skills .
12. We should prevent people from_______ (cut) down trees .
13. She always tries her best to improve her English by _______ ( practice) reading it every day .
14. Where's Mr. Green? He has gone to attend on _______(国际) meeting .
15. His father often _______ (punish) him because he is too lazy .