答案：第一行头像连陈欣，说明为“My family name is Chen. My given name "Xin" stands for happiness.”
第二行头像连孙新晨，说明为“My family name is Sun. My given name "Xinchen" means a new morning.”
第三行头像连程熙，说明为“My family name is Cheng. My given name "Xi" stands for bright light.”
解析：根据对话内容，“I'm Chen Xin.”“My name is Sun Xinchen. Xichen is my given name.”“I'm Cheng Xi.”以及各姓名对应的说明，可完成连线。

答案：Green; Black; Brown
解析：根据常识，英语中来自颜色的姓氏有White（白色）、Green（绿色）、Black（黑色）、Brown（棕色）等，结合首字母提示可知答案。

答案：（示例）My name is Li Ming. My family name is Li. My given name is Ming. "Ming" stands for brightness and hope.
解析：此题为主观题，介绍自己的姓名时，需说明姓氏（family name）和名字（given name），并解释名字的寓意，答案不唯一，合理即可。