假如你是新华中学的学生李华，你的美国朋友Tom一周前给你发电子邮件，询问你暑假里的打算，但你因准备期末考试未能及时回复。请根据双下要点给他回封邮件：
1.未及时回信的原因；
2.你假期的打算（如做兼职、旅行、做志愿者等）
注意：
1. 词数：120-150；
2 可适当增加细节，以使行文连贯。
【报道登山活动参考范文】
Dear Tom,
How are you doing? You asked me in your last letter about my plan for the coming summer vacation. I am sorry that I didn't reply without delay. How I wish I would read and reply your email as soon as I received it. However, I was busy preparing for my final exam at that time, which is vital for me. As a result, I had no choice but to completely focus on my study, for which I am very sorry. I hope you can understand me.
During the holiday, I am going to do a part-time job. On the one hand, I can earn some money to reduce the burden of my family. On the other hand, I accumulate the social experience, which does good to my future life. At the same time, I will not forget to go over my lesson. I will spend a instructive holiday. How will you spend your holiday? I hope you have a good time.
These are my plan for the summer vacation. What's yours? I am looking forward to your earliest reply.
Yours,
Lin Hua
