Every means ______ but without much result.

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问题 Every means ______ but without much result.

选项 A、have been tried
B、has been tried
C、have tried
D、has tried

答案B

解析 every means(每一种方法)为单数概念,方法是被人来试的,所以means与try之间是被动关系,正确答案为B。
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