假设你将作为光明中学高三毕业生代表，请根据以下要点在毕业晚会上用英文作一个告别演讲:
1.感谢家人，朋友和老师。特别举例感谢某个老师（不用真名，一律使用Mr. Wang, 并写出原因。
2.回顾高中三年的生活。列举出你印象深刻的活动。3. 展望未来。
注意：开头与结尾已经给出，所写部分120字左右。
Dear teachers, families and graduates, welcome and thank you for joining us tonight at Guangming High School graduation ceremony for the Class of 2014!
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