22、ORBIS is a c____________ that works for blind people. Blindness a____________ about 45 million people around the world, m____________ in poor countries. L____________, 80 percent of these cases can be cured or prevented. However, many of the patients are so poor that they can’t a____________ to travel to hospital, and there are still many who do not have the money for m____________ treatment.

ORBIS uses a flying eye hospital to visit poor countries. On the plane volunteer doctors p__________ operations. Dr Ma, a doctor working on the plane, once operated on 150 patients during his last visit.

The plane is also used as teaching centre. Local doctors and nurses can come to the plane to learn new skills and share their k____________. They can also watch operations on video. After they are t____________, they can help more people. ORBIS needs money to carry with its work. We can s____________ it by sending donations to ORBIS.