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。
Yesterday, I took a walk in the Panzhihua Park with my parents. The beautiful flowers were in various color. We were enjoying the scenery around when something unpleasant catch my attention. Not far from us, the middle-aged woman was eating some oranges while chat with her friends. In my surprise, she threw the orange skin on the ground, totally ignoring the sign nearby which was read “No Littering”. I think it is not a good behavior throw rubbish somewhere, and all of us should love our environment. As visitors, you should do something to protect the park after it becomes a huge dustbin.
