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题型:单选题 题类:常考题 难易度:普通
—
{#blank#}1{#/blank#} {#blank#}2{#/blank#}students are there in the classroom?
— Once a month.
{#blank#}1{#/blank#} {#blank#}2{#/blank#} she?
{#blank#}1{#/blank#} {#blank#}2{#/blank#} is this desk?
{#blank#}1{#/blank#} {#blank#}2{#/blank#} Mr. Smith {#blank#}3{#/blank#} on vacation?
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