As I went home, my heart was filled with excitement. I had earned a perfect score of 100 on my math test! Mom had promised that a big cream cake would be my reward for such a performance. Bursting through the door, I couldn't wait to share my great news.
"Mom, Mom!" I waved the test paper. "I did it! I got a perfect score!"Mom's face beamed （发光） with pride as she took the test paper. To my surprise, her expression darkened, but she quickly regained her smile. With a gentle smile, she said, "Oh, that's wonderful, honey! I'm so proud of you." "Can we get the cake now?" I asked eagerly. "Of course," Mom said. "I'll just go to the store and pick one up."
As Mom left, I couldn't contain my excitement. I switched on the TV, watching my favorite cartoons. Time seemed to fly by as I eagerly awaited Mom's return. When she finally arrived, we divided the cake, enjoying every bite. The sweet cream melted （融化） in our mouths. It was so delicious.
The following day in class, as we exchanged answers with classmates, I noticed something was wrong between my paper and the answer key. Puzzled, I went to Miss Johnson after class. "Excuse me, Miss Johnson," I said. "I think there might be a mistake. My answer to question number 15 doesn't match the answer key."
Miss Johnson took my test paper and examined it carefully. Her eyes widened in surprise. "Oh, my goodness, you're right!" she said. Miss Johnson compared my answer with the correct answer key and discovered that I had made an error on question number 15. My actual score was 95. A wave of embarrassment washed over me. "I'm so sorry, Miss Johnson," I lowered my head. "I didn't realize that I had made a mistake." Miss Johnson smiled gently. "Don't worry about it, honey. Mistakes happen."
Though Miss Johnson decided that she wouldn't change my grade, I couldn't shake the feeling that I should tell Mom the truth.
注意：1. 续写词数应为150左右；2. 请按如下格式在答题卡的相应位置作答。
Later that evening, as I got home, Mom was preparing dinner.
To my surprise, Mom burst out laughing, saying, "Oh, honey, I already knew that."
