______there was an epidemic approaching, Mr. Smith ______ the invitation to visi

游客2025-04-16  3

问题 ______there was an epidemic approaching, Mr. Smith ______ the invitation to visit that area.

选项 A、If he knew, would have declined
B、If he had known, would decline
C、Had he known, would decline
D、Had he known, would have declined

答案 D

解析 虚拟语气句型,对过去的情况表示虚拟,从句用过去完成时,主句用would have done “Had he known...”相当于“If he had known...”。
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