2. 外语
  3. As it turned out to be a small house party, we ________so formally.

As it turned out to be a small house party, we ________so formally.

admin2009-06-10  39
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 情态动词与虚拟语气。need not have done表示与过去事实相反，意思是“本不需做某事的”。did not need to dress up描述的是真实的过去事件，但在意思上与此句不符。
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