阅读下面短文, 掌握其大意, 然后从所给的四个选项中, 选出一个最佳答案。
"You don't understand me!” I shouted. Then I ran out of the door and got on a bus. I didn't know 1 it was going. I just want to get away from home as 2 as I could. I couldn't 3 what had just happened to me. My mother, the person I believe in, had just read all of my 4 from my close friends! It shouldn't have happened to me. She read my letters and told me not to write to 5 any more! I couldn't 6 the tears from falling when I thought about this. Later that day, I went to my close 7 house. 8 my friend gave me a cup of water, the phone rang. “It's your mother,” she spoke to me in a low 9. “Tell her that I'm not here!” I replied. However my mother heard it. “Tell her not to leave! I'll be right there!” Then she rang up the phone 10 a goodbye. In fact, I should say that I was a little 11 I couldn't imagine(想象) what would happen. But to my 12, when my mother arrived, “sorry” was the first word she 13 to me. Her 14 told me that she had been crying and her voice told me that she was really tired. “will you forgive(原谅) me?” at last she asked. I didn't know what to say. I just 15 her, and gave her a hug(拥抱). She held me so tightly. You know, at that time, I felt so warm. I really love you, Mum!
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（
在Ｒ上是增函数，而
＋
是一次函数，所以
