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题型:单选题 题类:常考题 难易度:普通
— There are forty. Students.
{#blank#}1{#/blank#} {#blank#}2{#/blank#} {#blank#}3{#/blank#}your grandma?
— .
— Twice a week. We clean their rooms and do some shopping for them.
{#blank#}1{#/blank#} {#blank#}2{#/blank#} you go to school every day?
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