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题型:单选题 题类:真题 难易度:普通
—- I have no idea.
whether if when which who why
Mary didn't go to school yesterday. {#blank#}1{#/blank#} {#blank#}2{#/blank#} {#blank#}3{#/blank#} she had a cold.
It is amazing {#blank#}1{#/blank#}China has{#blank#}2{#/blank#} such great achievements for the past thirty years.
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