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题型:单选题 题类:模拟题 难易度:普通
{#blank#}1{#/blank#} {#blank#}2{#/blank#} {#blank#}3{#/blank#}4:00{#blank#}4{#/blank#} {#blank#}5{#/blank#} .
I was washing clothes{#blank#}1{#/blank#} {#blank#}2{#/blank#} {#blank#}3{#/blank#}at this time yesterday.
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