Exercises for Vocabulary & Grammar,Fill in the blanks What do ORBIS doctors do? ( treat) They _ many patients. They dont have to pay for the _. What kinds of patients do they help? (blind) They help people who are _. Can they be cured? Most cases of _ can be either cured or prevented.,treat,treatment,blind,blindness,Many companies prefer to _ on TV. I dont like watching TV, because there are too many _. (advertise) About 45 million people around the world are _. However, 80 per cent of the cases
