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:在错的词下画一横线，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。

Today I’d like to introduce you to Chinese knots. In China, it is a long history of using knots for decoration. Culturally they are expected to keeping off evil spirits. Associated with symbolic meanings, knots are also used gifts.

One major characteristic of decorative knotwork is that all the knots is tied by using one piece of thread, which is usually about one meter in the length. However, finishing knots look the same from both the front or back. They can come in a variety of color, though the most common used color is red. This is why it symbolizes good luck and prosperity.