Just before the maths class,I__realized that I had left my m

Just before the maths class,I__realized that I had left my m Just before the English class,Isuddenly realized that I ( ) Just before the chinese class,I suddenly realized that I for Just before the English class,I suddenly realized that I ___ When I walked into my history class,I realized that I left m The class went on with the story（ ） they had left it before It was nearly class time ______ I remembered that I had left －Tom failed in the maths test.-just as I had expected. work on it had begun before my sister *left*(离开)和I am one of Work on it had begun before my sister left.Work前为什么不加the Twenty people had already left .I knew that my turn had come On my way to school,I ___ that I had left my textbook at hom