把下列句子按顺序排列,使其连成通顺的对话。
( )(1)Sun Hai:I know. Thank you.
( )(2)Liu Yun:Good morning, Sun Hai.
( )(3)Sun Hai:Who’s Li Ming’s uncle?
( )(4)Liu Yun:Li Ming’s uncle is an old man.
( )(5)Sun Hai: Good morning, Liu Yun.
( )(6)Liu Yun:He is a doctor in the hospital.
( )(7)Sun Hai:What does he do ?