增加：在缺词处加一个漏字符号（∧），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).每处错误及其修改均仅限一词；

2).只允许修改10处，多者（从第11处起）不计分。

    My grandfather and I 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 about 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 were a sudden pull at the pole and fish was caught. Within the next few minute, my grandfather also caught a fish.

       Felt hungry, we built a fire by the lake and barbecued the fish. It was delicious.

下面是一些关于学生吸烟的数据，请用一句话概括它的主要内容。（不超过40字）

    据有关统计，我国吸烟人群平均年龄呈下降趋势，各职业高中生中，超过90%的男生吸烟，我国13~18岁青少年约1.3亿，已超过5000万人吸烟或尝试吸烟。吸烟学生出现斗殴、赌博和观看色情制品的行为是不吸烟学生的2.6倍至4.1倍，吸烟学生出现抑郁、自杀意念和离家出走行为是不吸烟学生的1.2倍到4倍，失足青少年试吸率和吸烟率分别为94.6%和69.7%。