The conference________so successful if we hadn’t made adequate preparation.A、cou

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问题 The conference________so successful if we hadn’t made adequate preparation.

选项 A、couldn’t be
B、wouldn’t be
C、was not
D、wouldn’t have been

答案 D

解析如果我们没有做充分的准备，这次会议就不会如此成功。虚拟语气题。本题考查虚拟语气，根据句意可知是对过去事实的虚拟。此类虚拟条件句中条件从句的谓语结构为“had+过去分词”，主句的谓语结构为“would／should／might／could+have+过去分词”，故D项为答案。

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