Every knife and fork _____ carefully.A、have cleanedB、has cleanedC、have been cl

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问题 Every knife and fork _____ carefully.

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

答案 D

解析 knife和fork一起使用，被看做一个整体，指一套刀叉，它们作主语时谓语动词用单数。又因为主谓之间是被动关系，所以用被动语态。

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