动名词不等同于名词的,题目是og111 Egyptians are credited as having pioneered embalming methods as long ago as 2650 B.C. (A) as having (B) with having (C) to have (D) as the ones who (E) for being the ones who
答案我是没有意见的,问题是a项,og解释认为用regard搭配as就合理了。但是我还没见过regard as doing的用法呢(所以说题目贴出来作用也不大,大家别讨论到别的地方去了)