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。
Human beings has been interested in robots for quite some time. Scientists are always inventing new and better robots, that will play an important role in our future lives.
First, smarter robots will help us for the housework. They will take over jobs such as preparing meals, washing dishes, and sweep the floor. So we will have much free time to have a fun than before. Second, robots will be helpful for our work. They will do all the heavy and dangerous work, and help out in hospitals, schools and offices. Third, robots will be your friends. Whenever we felt sad, lonely or upset, we can have a chat with a robot. Robots will not only be good listeners but they will also offer us good advices.
In conclusion, robots will be more and more intelligent and we will benefit it in many ways.
