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____in time ,little Franz was afraid of being scolded.A.Not

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____in time ,little Franz was afraid of being scolded.A.Not having come B.Having not come
请问为什么选A
区别是很微妙的.
这里习惯更多说Not having come,表示在过去他没有完成某个动作.
一般用B选项的时侯表示的是过去一种未完成的状态.比如:Having not eaten meat in 6 months, he almost forgot what it tasted like.