请教一道语法题

bibizhou

1 More than five thousand yers ago, Chinese scholars accuratey described the flow of blood as a continuous circle controlled by the heart, [U]but it went[/U] unnoticed in the West.
(C)although it was
(D)but the discovey went

正确答案是D,请大家指教。

猫猫头

当然是D
it在GMAT中，除了用作形式主语外，不可以引导一句句子
它如果出现的话，应该是代词，具体指代前面的一个名词

yiyuan05

it 指代不明。

[此贴子已经被yiyuan05于2002-11-26 15:33:02编辑过]

suse

同意it不能指前面一句话，
另外went和was是不同的，went 强调动作，was强调状态。原句也是用went

举例，i became a teacher 和i was a teacher 是不能换的。

lucylu

补充go在句中的一种用法：
go表示习惯于某种状态，如：Refugees often go hungry.
You'd better go armed while in the jungle.
这种用法是to be不能取代的。[em12]