第四部分：写作（共两节，满分35分）

第一节：短文改错（共10小题；每小题1分，满分10分）

My class makes a visit to one of the old people’s homes in our city. When we got there, and we entertained them songs, dances and a drama. We also provided them with a good lunch. Spend some time with the elderly people made  us really happily. We began to understand the senior citizens better. At the same time, they realized that old people need love or affection. It may appear that the elderly people is happy and peaceful there, but deep in their hearts they are sad about be ignored by their own children. I think it is our duty to take care our parents and the elders.

过滤机的横向水平偏差不应超过（）%。