______ many times,he still could not understand it.
问题描述：
______ many times,he still could not understand it.
A.Having been told
B.Although he had been told
总感觉都对的样子...
答
都对的.这题出的不够谨慎.
having been told 为现在分词的被动式作状语,应存在明显的先后,故用完成式,否则就是让步状语从句.