As it turned out to be a small house party, we _____ so formally.A、need not have

游客2023-10-25  21

问题 As it turned out to be a small house party, we _____ so formally.

选项 A、need not have dressed up
B、must not have dressed up
C、did not need to dress up
D、must not dress up

答案 A

解析 根据前一分句中的turn out to be…“结果是,到后来才发现”,可知说话者事先并不知情,所以事实上穿得很正规,need not have done结构表示“本没必要”,符合题意,故A为答案。
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