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#}(8). Today is my birthday.
C: {#blank#}5{#/blank#}birthday!
B: Thank you.