查了一下原文，这里确实是承前省略了 school，相关上下文如下：

I needed his help because I had very little education. I began school at six. The school where I studied for only two years was three kilometres away. I had to leave because my family could not continue to pay the school fees and the bus fare.

因前面提到6岁上学，学校离家3公里，所以后面就“承前”省略了 school。