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题型：单选题 题类：常考题 难易度：容易
-No. We have practiced __________ it several times.
It snowed hard．{#blank#}1{#/blank#} {#blank#}2{#/blank#} {#blank#}3{#/blank#}, many students were late for school．
Let's meet at {#blank#}1{#/blank#} {#blank#}2{#/blank#} five in the afternoon.
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