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题型：单选题 题类：常考题 难易度：普通
过去完成时——原本….未能…..
— I'd love to, but I______ it already.
{#blank#}1{#/blank#} {#blank#}2{#/blank#} {#blank#}3{#/blank#}I got to the station, the train {#blank#}4{#/blank#} {#blank#}5{#/blank#}.
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