有一读者问： 有这么一道选择题：
(1)It is more important that she should be free_________she should live a luxurious life.
A. than B. that C. more than D. than that
答案为D，A不是也成立吗？
在规范英语中，此题的答案应是D。为什么呢？ 这应从语法角度来看。语法上，这里的第二个that从句和第一个that从句一样，也是一个主语从句，但又和第一个that从句有所不同：其后省去了is。此句亦可改作：
(2)That she should be free is more important than that she should live a luxurious life.
与上述句（1）相同或相似的结构在英语里并不罕见，再如：
(3)It is better that ten criminals should escape than that one innocent man should be hanged.
(4)Nothing could be more disagreeable to me than that I should have to do that. （that I should have to do that之后省去了would be）
也有人将用作主语的that从句中的that省去，但这是不规范的英语。
