对话一

A: "Who is that man over there？"

B: "The man who is wearing a blue suit is my uncle."

对话二

A: "Can you find the book I borrowed last week？"

B: "Sure, the book which has a red cover is on the table."

对话三

A: "What did you do last weekend？"

B: "I went to the park where we had a picnic last year."

对话四

A: "Who is the girl speaking on the phone？"

B: "The girl whom you met at the party is my sister."

对话五

A: "Where is the house you lived in？"

B: "The house whose windows are broken is abandoned."

对话六

A: "What is the name of the company you work for？"

B: "The company whose profits have increased is a well-known firm."

这些对话展示了如何使用定语从句来修饰名词或代词，使句子更加具体和清晰。希望这些示例对你有所帮助!