Supply the correct form of the word in italic

1. Thanh is always complaining about the heaviness of his suitcase. (C) 2. Is Janet finally used to cooking on an electric stove? (B) 3. After inventing the light bulb, Thomas Edison went on to create many other useful inventions. (A) 4. Thanh Ha School closed for two days last week because of a flood. (D) 5. The music was very loud and could be heard from a long way away. (C)