今年暑假,我到北京参加了全国数独夏令营活动。在去北京的几天前我就很兴奋了,因为参加这次活动的机会十分难得,要通过市、省晋级赛才能拿到资格证书。在去北京的火车上,我认识了新老师,交上了新朋友。我和他们一起研究数独,一起聊天,一起玩游戏,一起吃零食,一路上有说有笑的,开心极了! This summer, I went to Beijing to participate in the national Sudoku camp. A few days ago I was very excited to go to Beijing, because the opportunity to participate in this event is very rare, to pass the city, the province to qualify to get the qualification certificate. On the train to Beijing, I met a new teacher and made new friends. I studied Sudoku with them, chatting together, playing games, eating snacks together, talking and laughing along the way, very happy!