给下列句子排序,使它们组成一段通顺的对话。
{#blank#}1{#/blank#}Yes. Sometimes.
{#blank#}2{#/blank#}He's friendly.
{#blank#}3{#/blank#}Mr Chang will be our new PE teacher.
{#blank#}4{#/blank#}Wow, cool!
{#blank#}5{#/blank#}Really? What's he like?
{#blank#}6{#/blank#}Do you know him?
{#blank#}7{#/blank#}Is he strict?
{#blank#}8{#/blank#}Yes, he's my father.