This rule once______will never be forgotten.

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问题 This rule once______will never be forgotten.

选项 A、learning
B、learned
C、would be learned
D、was to learn

答案B

解析 句意:一旦学会了这条规则就永远不会忘记。非谓语动词题。此处once learned作后置定语修饰rule,因为learn和this rule是动宾关系,所以要用过去分词,表被动和完成。故选B。
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本试题收录于: 英语题库普高专升本分类
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