增加：在缺词处加个漏字符号（∧)，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。
Last week, a group of foreign students come to our school to experience tea culture, which turned out to be great success.
Upon arrival, they couldn't wait to visit the tea house, that a lot of tea sets were on display. Then, I made a vividly presentation on how to make tea, arouse their interest greatly. Under my guidance, they began to make tea by their own. Although they didn't do good as expected, but they felt pleased with what they'd done. The activity ended in a happy atmosphere. In memory of it, none of us took photos, feeling satisfied and happy. It hit me that traditional tea culture was of great valuable.
