—This is ____________ useful book, I think.—So it is, and it's ____________ unusual one.

题型：单选题题类：常考题难易度：普通

新目标英语九年级上Unit 3 Could you please tell me where the restrooms are?Section B同步优化训练

—This is ____________ useful book, I think.

—So it is, and it's ____________ unusual one.

A、an; / B、an; an C、a; an D、a; a

举一反三

—Because it's very helpful.

— I think it's ________, but some people think it's so________.

A→{#blank#}1{#/blank#}→{#blank#}2{#/blank#}→{#blank#}3{#/blank#}→{#blank#}4{#/blank#}→{#blank#}5{#/blank#}

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