短文中共有10处语言错误，每句中最多有两处。错误涉及一个单词的增加、删除或修改。
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l0处，多者(从第ll处起)不计分。
Swmming is very popular．People like it in summer because water makes people feeling cool.But if you swim in a wrong place，it may not be safely．Last year，a lot of people died when enjoy thrmselves in water，most of them were students．Nowadays，some people are not careful enough
in swimming．They often think they swim too well that nothing will happen on them in water.Don’t forget：better swimmers died in water．They die not because they were not good swimmer，but because they were not careful．So don’t get into the water when you are alone．If you see“No
swimming”,don't get into water．Unless you remember that，swimming will be safe．