B
在具体某一天或在跟具体某天有关的早午晚,介词都用on
希望我的回答能够帮到你,在具体某一天或在跟具体某天有关的早午晚，介词都用on能造几个例句吗？不胜感激在具体某天前：on Monday, on September 8, on Teachers' Day在跟具体某天有关的早午晚前：on Monday morning, on the afternoon of September 8, on the evening of Teachers' Day