◎ 题干
改错题。 
Christie was one of my best friend at high school   
At that time, we often spend time together.         
Thank to her help, I made great progress in my     
study. Last year, he decided to study abroad. In   
other words, we would be separated for long time.   
Before her leaving off, I prepared a gift to show   
my best whishes to him. She said it was the best   
gift she has ever had. From then on, we've         
kept touch with another through e-mails. I         
look forward to see her again in the near future.   
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5______                                           
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◎ 解析
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◎ 知识点
    根据n多题专家分析,试题“改错题。Christie was one of my best friend at high school At that time, we often spend time together. Thank to her help, I made great progress in my study. Las…”主要考查了你对  【可数名词及其单复数】【不定冠词】【人称代词】【介词和介词短语】【动词的过去式】【动词短语】【动名词】【过去完成时】  等知识点的理解和应用能力。关于这些知识点的“档案”,你可以点击相应的链接进行查看和学习。