假定英语课上老师要求同桌之间交换修改作文，请你修改你同桌写的以下作文。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. 每处错误及其修改仅限一词；
2. 只允许修改10处，多者（从第11处起）不计分。
I passed all the other course that I took at my university, but I could never pass botany. This was why all botany students had to spend several hours a week in a lab look through a microscope at plant cells, and I could never see through a microscope. This was used to make my professor angry. “I can’t see everything, ” I said. Then he began patient enough to explain how to see through it, but I still couldn’t make it. At last we tried it with every adjustment of the microscope known to men. With my pleasure, I saw something and drew it quickly on the paper. “What’s that?” my professor asked. “That’s what I saw.” I answered. “No, you don’t!” he shouted, and he bent over and looking into the microscope. “That’s your eyes! You’ve fixed the lens so that it reflects! You’ve drawn your eyes!”