Every ________ been tried to save the patient．

Every ________ been tried to save the patient．

A.mean has

B.means has

C.mean have

D.means have

答案及解析： 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．