EXERCISE A Write S if the words mean the same and O if they are opposites. 1. S 2. O 3. O 4. O 5. S 6. O 7. O 8. S 9. O 10. O EXERCISE B Match words to their meanings 1. E. find how many 2. D. sormething that is wrong 3. A. opposite of easy 4. F. how much something costs 5. B. tell how to do something 6. C. Know 7. G. not in class EXERCISE C Use the words in the box to complete the paragraph 1. Mistake 2. Error 3. Understood 4. Understand 5. Each 6. Explain 7. Count 8. Price 9. Problem 10. Easy