45. modst people get their wisdom teeth removed before they can squeeze other teeth out of place or get infected.

41. the members of an audience at a concert are made to take turns pedaling electricity generating bikes.

speakers, lights, and amplifiers all need power to help entertain the audience.

48. the little man worked well around the farm, busy from dawn to dusk.

빨간색으로 쓴 단어들 문법 설명 좀 부탁드려요