One possible version：
Dear Robert:
How time flies! The happy days we shared often shines in my memory. As you know, my college entrance exam is approaching, which also announces the end of this sort of pressing study life. However，I intend to have a meaningful summer vacation. First, I will learn to drive to get a driving license, which is a new activity for a high school graduate in China. I will have a good rest, enjoying my hobbies. Then I will take some English courses to improve my English communication ability。As the world expo has started ，I’d like to visit the expo garden ，experiencing various cultures as well as adcanced technologies of different countries。After that, I will pay a visit to some tourist attractions in shanghai to widen my horizon。finally ，I also plan to work out in the gym three times a week so as to be ready for my further study。
That is the plan for my vacation. I am looking forward to being told about your arrangements of vacation. Give me your quick reply soon, OK? What about you?
Best wishes!
Lihua
略
