| A | B |
|---|
| electrician | someone who works with electricity |
| survivors | people who have stayed alive |
| wreckage | the remains of something that has been destroyed |
| apprentice | a person who learns a trade by working for a skilled worker |
| revolutionized | changed completely |
| efficiently | without wasted time, energy or materials |
| inventor | someone who invents new things |
| patented | gained the right to be the only one to make, use or sell an invention |
