circus – n. a show involving a group of traveling performers and animals doing tricks for an audience

gradually – adv. happening slowly over time

era – n. a period of time during which particular events or progress in development are common

aquarium – n. a building people can visit to see water animals and plants

uncork – v. open a bottle by pulling out its cork

charity – n. organization whose purpose is to give money or food or provide help in other ways

exploit – v. to use (someone or something) in a way that helps you unfairly

circumstance – n. a fact or event that makes a situation the way it is