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。每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。

One day I hurried home for lunch after school because of there would be an exam in the afternoon. I expected get back early to prepare for the exam. But when I got home, the lunches was not ready yet. I am unhappy. When the dishes were served, I found none what I liked. I ran out of the house angry, and then walking in the street for a while. When I got into the room, I saw the lunch box on my desk. One classmate told me my mother had brought them for me. Before opening the box, I found my favorite food inside. My eyes quickly filled with tears.

一个氘核(₁²H)和一个氚核(₁³H)结合成一个氦核并放出一个中子时，质量亏损为Δm，已知阿伏伽德罗常数为N_A，真空中的光速为c，若1 mol氘和1 mol氚完全发生上述核反应，则在核反应中释放的能量为[ ]

A．N_AΔmc²　　　　　　　　　

B．2N_AΔmc²

C．N_AΔmc²

D．5N_AΔmc²