单选题 Children going to school must have a chance to ______ excess physical energy; children even more than adults require and enjoy physical exercise and games of all kinds.
A. work off B. let off
C. play off D. put off

【正确答案】 A

【答案解析】[解析] work off“排除，消除”，如：He usually works off his drowsiness by taking a brisk walk. 他经常用轻快的散步来消除瞌睡。let off“放(炮)；免除(责任、任务)”；play off“假装；冒充；再赛以决定胜负”；put off“推迟”。