增加：在缺词处加一个漏词符号(∧),并在其下面写出该加的词。
删除：把多余的词用斜线(\)画掉。
修改：在错的词下面画一横线,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。
Though great progress has made in science these years, there are still many people lived in poor conditions. They make their living by collecting and selling used thing. Their children cannot go to school because they have no enough money to send their children to there. Why you think so many people still suffer from poverty now? The answer lies on the population explosion. A president of a developing country once said: “It is us who are to blame for the poverty because we used to produce child without limit.” Although these few words sound simple enough, but they have clear pointed out one of the causes of the population explosion.
