短文改错。
假定英语课上老师要求同桌之间交换修改作文，请你修改你同学写的以下作文。文中共有10处语言错误，每句中最多有两处。错误涉及一个单词的增加、删除或修改。
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。
My father is a farmer. He had only received five years of education in school but he can also gain a lot of in field work for his diligence.
Last December，I went home for vacation. I learned that his father had suffered great losses in breeding ducklings because of a unknown disease and planting watermelons that were rotted due to the heavy rainfall. Father sighed, “You can never change so unexpected bad luck.”
I didn't argue. The next day I went downtown and brought some agricultural guidance book back home. While scanned one of the books after my strong recommendation, father says，“God，if only I had known this！”
Since then, father has held a difference attitude toward books. He succeeded. Knowledge changes bad luck!
