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___many times,tom stilldid not know what i meant then ___man

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___many times,tom stilldid not know what i meant then ___many times,he finally understood it
A.told B having been told 第一个选A第二个选B
从then为句末词。后面是另一个句子
___many times,tom stilldid not know what i meant then ___man
这里B是独立主格结构,省略主语但要有主语的,而主语就是Tom,是tom被告诉因此要用被动语态,只能选B,逗号前面构成分词结构.这种表达只有ing和being done两种不可以用A哦 否则就得说 Tom has been told many times,and he still.了
你把 空到times括起来 就可以看出其实也是充当分词状语,因此还要选B
Having been told many times,Tom still did not know what I mean then (having been told many times) he finally understood it.