问题
单项选择题
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
答案
参考答案：A
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”。