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Every ________ been tried to save the patient.

[  ]

A.mean has

B.means has

C.mean have

D.means have

答案:B
解析:

every只能接单数可数名词,而means是单复数同形的单词,故谓语动词用单数;当these, all修饰means时,谓语动词用复数.


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