1. (2020·天台模拟) 假如你是Liu Yu, 以下是你的美国笔友Jack给你写的一封信。请根据信的实际内容，给Jack回一封信。

Dear Liu Yu,     How time flies! You are going to graduate soon. Congratulations! In the past three years, I believe your wonderful school life has left you a lot of special memories. You must have grown up a lot and be able to manage your own life. Can you tell me the great progress you've made? What are you going to do to improve yourself this summer? Hope you can share your experience and plans with me.     Wish you all the best. Yours, Jack

注意：1）请回复信中所提到的两个问题，可适当发挥。

2）文中不得出现真实的人名和校名等相关信息。

3）词数: 80~100。短文开头和结尾已给出，不计入总词数。

Dear Jack,

    Thanks for your letter.

Yours,

Liu Yu