弱问：强调句的应用。。请假达人。。

kevinstarrk

gmat语法题中的强调句怎么分辨呀？请假各位达人~比如：
1.       A recording system was sosecretly installed and operated in the Kennedy Oval Office that even Theodore C. Sorensen, the White House counsel, did not know itexisted.
(A) A recordingsystem was so secretly installed and operated in the Kennedy Oval Office that
(B) So secret wasa recording system installation and operation in the Kennedy Oval Office
(C) It was sosecret that a recording system was installed and operated in the Kennedy OvalOffice
(D) A recordingsystem that was so secretly installed and operated in the Kennedy Oval Office（A）
(E) Installed andoperated so secretly in the Kennedy Oval Office was a recording system that
答案是A阿。。可是，可是为什么C不行呢？

wenchang

C怎么翻译？It指代什么？“它如此的秘密以至于一个录音系统被安装在肯尼迪椭圆形办公室甚至。。。”整句话驴唇不对马嘴啊，而A中“一个录音系统被如此秘密的安装在肯尼迪椭圆形办公室以至于甚至。。。”这个多舒服