If shethat Mary would come to see her she would never have gone to the party.A. had known

问题补充：

If shethat Mary would come to see her, she would never have gone to the party.

A. had known

B. knew

C. knows

D. would know

答案：

(答案→)A. had known

B. knew

C. knows

D. would know

解析：考查虚拟语气。本句是一个条件句的虚拟语气，条件句中使用过去完成时；主句使用“情态动词+have done”句意：如果她知道Mary来看她，她就不会去那个聚会了。故A正确。

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