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。
When I was in primary school, I often went to the wetland of my hometown, there I could see many different kinds of animals, including wild birds, fish, snakes, insets and so on. That was an interesting place for I and my friends to watch the birds and study them. And things have begin to change in recent years. Small birds are being caught up with nets. Wild ducks are being sold at food markets. And even bad, the wetland is being destroyed. Some parts are being covered with new house. You can see rubbish everywhere. The wetland is being polluted serious every day. I am very worried it. How can we do?
