假定英语课上老师要求同桌之间交换修改作文，请你修改同桌写的以下作文。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。
A young couple bought a big house from two sisters, whom had lived there for 30 years. The house was nice and the couple bought it at low price.
However, winter wasn't far away at the time. The couple was a little bit worrying about how they would keep the house warm, since it didn't have any fireplaces. And later, they thought that if the sisters were able to stay warm and comfortably in the house during the winter, so could they. With that in mind, they decided not to make any preparations for the cold weather.
Winter arrived and temperatures soon drops below zero. The large house became freezing cold, with frost（霜）covered the walls. Finally, the husband couldn't bear with it anymore. She called the sisters to ask them how they managed to keep warm during the winter. “The cold weather never bothered us,” one of the sister told the husband. “We just went on vacation to Thailand every winter.”
