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  3. The cave might never have been discovered ______ by the distinguished French pot

The cave might never have been discovered ______ by the distinguished French pot

游客2023-10-27  9
问题 The cave might never have been discovered ______ by the distinguished French potholer, Berger.
选项 A、not spotted the entrance
B、without the entrance spotting
C、not the entrance having been spotted
D、had the entrance not been spotted
答案 D
解析 主句的might，never have been表明是对过去情况的虚拟，从句需用过去完成时，故D正确。虚拟语气在条件状语从句中如果省略连词if，从句须部分倒装，D项had the entrance not been spotted…为if the entrance had not been spotted…的省略形式。
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