增加：在缺词处加一个漏字符号（∧），并在其右边横线处写出该加的词。

删除：把多余的词用斜线（﹨）划掉，在该行右边横线写出该词，并用斜线划掉。

修改：在错的词下划一横线（__），并在该行右边横线写出修改后的词。

    Nowadays big cities may be wonderful places to live. There are many nice things to see and to do. And there are serious problems in big cities. The cost of living is high.

    Every year many people move to the cities because of more chances (机会)to find job or good schools. But sometimes some people can't. Also, having too many people in a small place makes it hard to keep the cities safe and clean. Someone enjoy staying in big cities, but others don't. There really are a lot of problems, so you should think about it carefully before moving there.

增加：在缺词处加一个漏字符号(∧)。删除：把多余的词用斜线（\）划掉。

修改：在错误的词下划一横线。注意：每行有且只有一处错误。

    I live in the country and my father was a farmer.

    He is now forty-five year old. Because of years of hard work, he looks old than his age. When I was young, he used to tell me the important of study. Father knows a few about English and other subjects, but he usually gives me some good advices on how to learn my lessons good. He is not only kind to me but also very strict in me. With his help, I've made great progress. I'll never forgot what he taught me. I think my father is best father in the world.

Andy is good at play baseball.

There are a very big river between their school and the village.

We can't to be noisy in the library.