All of the students had a good time on last Saturday并写出为什么要这样改

问题描述:

All of the students had a good time on last Saturday
并写出为什么要这样改

All of the students had a good time last Saturday

All of the students had a good time last Saturday.
把on去掉

要么是ON SATURDAY
要么是LAST SATURDAY
你做多了就知道了