请问一道语法题【已解决】

cyf3732

Perhaps even more important than the accuracy and realibility of a meteorological instrument ___.
A.that positioning it is correct
B.is positioned correctly
C.that its correct position
D.is that it be positioned correctly

答案选D。
请问为什么这里的从句是“that it should be ....” 呢？
另外这里为什么要用虚拟语气呢？

谢谢！

[此贴子已经被作者于2006-8-6 19:37:12编辑过]

cyf3732

解决了！

整个句子实际上是按照It is important....来的，只不过做了倒装，其实本来的顺序是这样：

Perhaps it is more important that a meteorological instrument (should) be positioned correctly than the accuracy and realibility of it.

考题里面把it is 这个部分倒装到后面去了，意在强调important。呵呵～

Amelia_He

可以看出来是倒装，但正常语序还是看不出！好郁闷啊！似懂非懂的感觉！

不是托福语法不考虚拟语气的吗？这是改革趋势吗？