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题型:单选题 题类:模拟题 难易度:普通
—Black.
— They're ________.
—_______.
—It's made of silver.
{#blank#}1{#/blank#} {#blank#}2{#/blank#} {#blank#}3{#/blank#} It {#blank#}4{#/blank#}to do your homework every day?
Excuse me,{#blank#}1{#/blank#} the railway station?
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