OG11版 118题 students in the metropolitan school district

elvaxiaobai

118. Students in the metropolitan school district lack math skills to such a large degree as to make it difficult to absorb them into a city economy becoming ever more dependent on information-based industries.
(A) lack math skills to such a large degree as to make it difficult to absorb them into a city economy becoming
(B) lack math skills to a large enough degree that they will be difficult to absorb into a city’s economy that becomes
(C) lack of math skills is so large as to be difficult to absorb them into a city’s economy that becomes
(D) are lacking so much in math skills as to be difficult to absorb into a city’s economy becoming
(E) are so lacking in math skills that it will be difficult to absorb them into a city economy becoming

想问一下 economy becoming blabla后面的是独立主格结构么？？为什么没有逗号呢？
如果不是的话 那是什么结构呢
没有看懂这部分

非常感谢~~

cynthia1991

应该是分词作定语吧。

elvaxiaobai

那可以这么用？？
SVO+n+doing???中间都不加点逗号什么的？？？