1. She is intelligent, but her ____ annoyed everyone so they didn’t love her. BEHAVE
2. Why don't you call the _________if the lights don't work? ELECTRIC
3. Solar energy is not only ___________ but also cheap and clean. PLENTY
4 ___________to drive this vehicle is not easy. LEARN
5. The distance from your house to school is much ______than I thought. LONG
2. Electric => Electrician
3. Plenty => Plentiful
4. Learn => Learning
5. Long => Longer