◎ 题干
As it turned out to be a small house party, we __________ so formally.
A.needn’t dress upB.shouldn’t dress up
C.were not necessary to dress upD.needn’t have dressed up
◎ 答案
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◎ 解析
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◎ 知识点
    根据n多题专家分析,试题“As it turned out to be a small house party, we __________ so formally.A.needn’t dress upB.shouldn’t dress up C.were not necessary to dress upD.needn’t have d…”主要考查了你对  【虚拟语气】【情态动词】  等知识点的理解和应用能力。关于这些知识点的“档案”,你可以点击相应的链接进行查看和学习。