假设你叫李华，你听说即将来你校任职的外籍教师David需要一名学生助手，你想自荐做他的助手。请你用英语写一封自荐信，要点包括：
1. 写信目的；
2. 你作为助手的优势；
3. 表达期待。
注意：
1. 词数80左右；
2. 可以适当增加细节，以使行文连贯；
Dear David,
I’m Li Hua, a student from Xinhua Senior Middle School. It’s great to hear that you are coming to teach in our school next semester. You said you want an assistant to help you with your work, and I think I am qualified for the job.
Firstly, being one of the top ten students in our school, I am able to speak fluent English. Secondly, I can use the computer skillfully. What’s more, I have a gift for communicating with others and I am always ready to help people in need. So I’m sure to be helpful in your work and life in China.
I’ll appreciate it if I have the chance to be your assistant. Looking forward to your coming.
Yours,
Li Hua
