各位老师好
Most of the large industries in the country are well organized and structured
and are sometimes backed up internationally reputable companies.
(A) Most of
(B) in
(C) are well organized
(D) backed up
这一题是要选何者为错
答案为D
查了一下
back up的意思蛮多
其中有支援的意思
所以觉得D似乎没有错
想要请问各位老师D错的原因是为什么呢?
谢谢大家