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题型:单选题 题类:常考题 难易度:普通
— I'd love to, but I . I have much work to do.
—They be hungry after such a long walk.
—It be father, but I'm not sure.
They {#blank#}1{#/blank#} sing {#blank#}2{#/blank#} dance.
—I am afraid you ___. This is a non-smoking area.
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