英语课上，老师要求同桌同学相互修改作文。假设以下短文为你同桌所写，请你对其进行修改。文中共有10处错误，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：在缺词处加一个漏词符号（^），并在此符号下面写出该加的词。

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。

3．必须按答题要求做题，否则不给分。

This afternoon I was having a PE lesson while I fell down and hurt my foot. I was in greatly pain at that moment, but I tried to act as if nothing has happened until the class was over. Though I had difficulty walk back to my classroom, I still didn’t tell anyone but even refused the offer of help of my classmates. As result, the hurt in my foot became bad. Now I know I am wrong. We can tell others our need for help and accept his help. Some day we can help others in return for. In this way, we can get along to each other happily and peacefully.

Lillie黑色素染色的结果正确的是（）。

A.黑色素呈暗绿色，背景浅绿或不着色，肌纤维黄色

B.黑色素呈黄色，背景不着色，肌纤维绿色

C.黑色素呈黄色，背景浅棕色，肌纤维绿色

D.黑色素呈黑色，背景浅黄色，肌纤维不着色

E.黑色素呈暗绿色，背景浅黄色，肌纤维红色