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.