885-2-14

透明萝卜

14.   Although one link in the chain was demonstrated to be weak, but not sufficiently so to require the recall of the automobile.

(A) demonstrated to be weak, but not sufficiently so to require

(B) demonstrated as weak, but it was not sufficiently so that it required

(C) demonstrably weak, but not sufficiently so to require

(D) demonstrably weak, it was not so weak as to require（D）

(E) demonstrably weak, it was not weak enough that it required

这道题做起来一点感觉都没有，请教各位nn此题如何分析呢？

三脚猫

已有although, 主句再出现but，肯定错雾，由此排除ABC。
so  as to 比enough  that简洁，由此选D,
另外so  as  to的用法可参见质顶贴

透明萝卜

谢谢了！