单选题 Every chemical change either results from energy being used to produce the change, or causes energy to be ______ in some form.
A. given off B. put out C. set off D. used up

【正确答案】 A

【答案解析】[解析] A项given off意为“释放，放出”；B项put out意为“扑灭；生产”；C项 set off意为“动身；开始”；D项used up意为“用光，用完”。