假定英语课上老师要求同桌之间交换修改作文，请你修改你同桌写的以下作文。文中共有10处语言错误，每句中最多有两处。每处错误仅涉及一个单词的增加，删除或修改。
增加：在缺词处加一个漏词符号（）, 并在其下面写出该加的词。
删除：把多余的词用斜线（\）划掉。
修改：在错的词下划一横线, 并在该词下面写出修改后的词。
注意：1. 每处错误及修改均仅限一词;  
2. 只允许修改10处，多者（从第11处起）不计分
My grandfather and me enjoy fishing.
One Sunday morning we go fishing at a lake. We took ours fishing poles and headed for the lake. As soon as we arrived, so we dropped the lines into the water. Before waiting for half an hour, I was beginning to get impatiently. I wanted to give up, and my grandfather told me to wait a little longer. Finally, there came a sudden pull at the pole and fish was caught. Within the next few minute, my grandfather also caught a fish.
Feeling hungry, we built a fire by the lake over which we cooked the fish. It was tasted good.