我在交论文前做了一些修改。

I made some ___corrections before handing in my essay.

她失望地看到她的论文被退回，上面有大量用红笔做的修改。

She was disappointed to see her essay returned with a mass of ___corrections in red ink.

我的新老师对我们作业和考试的批改更仔细。

My new teacher is more careful with his ___correction of our work and exams.