The train was speeding onward. She looked into the distance with sad happiness. It was not the first time that she had left for school. However, she had much more complex feeling this time.

She was heading to her new school to finish her postgraduate study there. She made a lot of efforts to struggle for the postgraduate entrance examination. And finally she made it. She still remembered the night that the result was posted. It was at the midnight. She tossed and turned in bed and could hardly fall asleep from sunset to midnight. It was exactly twelve o’ clock. She saw the dramatic result which gave her the opportunity to start this trip. She did not fall asleep in the rest of the night.

Above all, she felt happy about that. Nevertheless, what about the high tuition? Though she was eager to get further study, she tried to persuade her mother to give her permission to get work after graduation, for she wanted to relieve heavy economic burden on her family. Her mother told her not to worry about money and she should fight for further study. Staring at her mother’ s wrinkles and grizzled hair, she smiled and blinked back her tears.

It has been a long time since she stayed so close to her mother. She still remembered their happy time when she was in junior high school. After she entered senior high school, they spent less and less time together, only a few times a year now. “How quickly mom gets old!” She thought. In her memory, mom was the most strong and lofty figure. But now, her mother’ s youth faded as the child grew up. The opportunity for her to stay with her mother would be even much rarer in her postgraduate years.

She said in her heart, “Therefore, use every opportunity to express our affection to the person we really love, before that time passes and we regret it. Memories happen even if we aren’ t conscious of it. The happy and bitter moments often become memories that we look back upon later with laughter and tears. These are the things that we should always keep in mind and bring with us to every journey. ”

The train kept whirling and whistling ahead, driving off her sadness. 

本题要求以“The train was speeding onward. She looked into the distance with sad happiness. ” 为首句， 写一篇400字左右的故事。 要注意题干中的“sad happiness” ， 要考虑主人公在踏上旅程时， 什么使她又开心又难过？ 

范文讲述的是一个刚考上研究生的女生离开家时的心路历程，让她开心的是即将奔赴研究生学习，让她担忧的是家里的经济状况和母亲。之前，为了减轻家里的经济负担，她想大学毕业后找工作，但是妈妈鼓励她继续学习。不知何时，妈妈的脸上已经布满皱纹，头发也已花白。她回想起自己小的时候与妈妈一起度过的快乐时光，那时妈妈就像自己的超人。但是随着年龄的增长，与妈妈在一起的时间也越来越少。主人公最后在心里想到，我们应该利用每一个机会来向自己爱的人表达自己的情感。