题目内容：

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。

Our class joined in a meaningful activity during the winter vacation. First, we went to visit the old lady who lived all alone. Some chatted with her but others helped do a thorough cleaning for us. When the work was done, the house looked real neat and tidy. Then we went to the sport center, where all equipment needed polished. We set out to work at once. Everything was dust-free at no time. Having done all this, we saw a pleasant community than before. Tiring as we were, we felt happy as all of our work was paid off.