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，每句中最多两处。错误涉及一个单词的增加、删除或修改。
增加：在此处加一个漏字符号(∧)，并在其下面写出修改的词。
删除：把多余的词用斜线(＼)划掉。
修改：在错的词下划一横线，并在其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（从十一处起）不计分。
One afternoon Jack is walking lonely down a river．It was very cold and on the river few boat could be seen. When he stopped on a bridge and look down, he saw a terrible scene．A boy fell out a boat and was struggling in water. Without think about himself, Jack jumped into the river and to save the boy．He was about to drag the boy to the river bank when he saw some people stand in a motor boat under the bridge. One of them stared at Jack and said angry, “They are making a film and you’ve spoiled a whole afternoon’s work!”