短文改错（共10小题；每小题1分，满分10分）
1. 请按标准格式改错，每处错误及其修改均限一词。
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.