假如你是李华，昨天学校为你们举办了十八岁成人仪式。请根据下列要点给你在美国的笔友发一封电子邮件，描述仪式过程并简述你的感受。
1．成人宣誓 2．感谢家长和老师的教育和培养 3．老师送贺卡 4．表演节目
注意：
1．邮件必须包括以上要点，要适当发挥；
2．词数：100左右；
3．开头结尾已为你写好。
生词：宣誓make an oath 仪式ceremony
Dear Tom，
Yours
Li Hua
Dear Tom
It is great to receive your email．Now I’d like to tell you something that took place in my school yesterday. In the afternoon we held a growing - up ceremony for our coming 18 - year - old birthday. At first we made an oath that as grown - ups we should have a sense of duty for our society from now on. Then we showed our thanks to our parents who had gone through hardships to bring us up and teachers who have been educating us patiently. And our teachers also gave us cards expressing their good wishes to us. Finally, we put on wonderful performances, singing and dancing. We learned a lot from the activity. I think it’s very important for us. I will remember the day in my life.
Yours ,
Li Hua
十八岁，人生的黄金时刻，学生还是有话可说。重点写出个人感受。