III. Use the correct form of the word given to complete each sentence 16. The professor explained his ideas with great ........................(clear) 17. The cost of the............................ (carry) must be repaired by the buyer. 18. His health was seriously affected and he suffered from constantly.................. (sleep). 19. In ancient Greece, the owl was a symbol of................ (wise) 20. The judge told him it was..................... (responsible) to drink and drive, and banned him for a year.