___many times,tom stilldid not know what i meant then ___many times,he finally understood it

题目

___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

答案

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 h...