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

游客2023-11-05  20

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 虚拟语气题。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 enUance not been spotted…为if the enhance had not been spotted…的省略形式。
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