假定在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。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．每处错误及其修改均仅限一词;
2．只允许修改l0处，多者(从第11处起)不计分。
What would we do without refrigerators? We take it for granted now, but what is it like before the refrigerator was invented? Have you never left milk out of the fridge for a day in summer? In just that time it will go badly, so you can imagine what hard life was before. For a long time, people have been using ice to make food lasting longer.
The first refrigerators were sold in late 1880s and they soon became very popular. Nowadays, almost everyone has a fridge in their homes and modern refrigerators are much more safer. Some of them are such modern that they can tell you what needs buying in advance!