① Are these all ours? {#blank#}1{#/blank#}     A. It is Zhang Peng's.

② Whose is it? {#blank#}2{#/blank#}     B. Yes，it is.

③ Is this yours?{#blank#}3{#/blank#}     C. Yes. they are.

①Teachers'Day is on the {#blank#}1{#/blank#}of September．

②Three plus six is{#blank#}2{#/blank#}．Twenty—five minus(减){#blank#}3{#/blank#} is seventeen．

③W is the{#blank#}4{#/blank#}letter in the alphabet(字母表)．

I want to {#blank#}1{#/blank#} {#blank#}2{#/blank#} {#blank#}3{#/blank#}.