根据句意或提示补全对话。A: Tom, this {#blank#}1{#/blank#} my brother, Jim.
B: {#blank#}2{#/blank#} old are you, Jim?
C: I am seven {#blank#}3{#/blank#} old. What about you?
B: I am {#blank#}4{#/blank#} (9). Today is my birthday.
C: {#blank#}5{#/blank#} birthday!
B: Thank you.