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题型：单选题 题类：模拟题 难易度：容易
—But Maths is very useful. It's silly you to drop it.
It's great {#blank#}1{#/blank#} {#blank#}2{#/blank#} {#blank#}3{#/blank#} you·
因为我的发音不好，我不敢问问题。
My sister is {#blank#}1{#/blank#} {#blank#}2{#/blank#} her homework.
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