应该说on the first day还是at the first day答:on the next morning, on the point of(正在…时候), on the spur of the moment(立刻) on this day, on this occasion, on time [at]:at a time(在某时), at a wedding(婚礼), at all times(一直), at any moment, at any time, at Christmas, at dark (天黑时), at dawn(在...
介词短语答:二、与on /upon搭配 1. act on, rely on, depend on, feed on, comment on, concentrate on, rest on, in 2. be based on, be keen on, be dependent on The boy is keen on mathematics. (这个男孩对数学感兴趣) 三、与of搭配 1. think of , consist of, take charge of 2. be composed...