单选题 He gets up at six o'clock, runs for half an hour and then has a meal; that is his morning______.
【正确答案】 D
【答案解析】解析:考查名词。根据“他每天早晨六点起床,跑步半小时,然后吃饭”可知,这是他早上的习惯。故选D项。policy意为“政策”;behaviour意为“举止,行为”;tendency意为“倾向,趋势,癖好”;routine意为“程序,日常生活,例行公事”。