题目内容：

He can't be home now, for I saw him
() in the gym just now.
giving out/working out
为什么不是giving out

优质解答

work out 有“锻炼,健身”、“计算出”、“有结果”等意,give out为“发出（光 热 气...)、分发”等意,所以应是working out