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题型:单选题 题类:模拟题 难易度:普通
— They're kind and helpful.
—I improve it ______ listening to tapes.
{#blank#}1{#/blank#}did they {#blank#}2{#/blank#}the hotel successfully?
— _______.
{#blank#}1{#/blank#} {#blank#}2{#/blank#}the students {#blank#}3{#/blank#} yesterday afternoon?
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