29. Last summer, my elder brother joined some voluntary(adj) (volunteer) doctors helping poor people in remote areas
30. He had all the fences around his home electrified(v) (electricity)
1. Some people have very firm belief(n) in the existence of UFOs. (believe)
2. The machine works ineffectively(adv) and doesn't help me much. (effect)
3. We decided to leave early to avoid the inconvenience(n)( convenient) of traveling in the rush hour.