The Whites are going on a trip next week(人教版高三英语下册...
①.表示在具体的某一天用介词on, 如: on Tuesday, on September 29th; 表示在上午, 下午, 中午, 晚上一般应用介词in, 但表示在具体的某一天或有具体某特征的某一天的上午, 下午, 中午, 晚上用介词on, 如: on the morning of our sports meet, on the afternoon of the rainy day. ②.表示在某假日时,...