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标题: 请教一道语法题！！！ [打印本页]

作者: luyinan 时间: 2008-7-8 23:36
标题: 请教一道语法题！！！

Before scientists learned how to make a synthetic growth hormone, removing it painstakingly in
small amounts from the pituitary glands of human cadavers.
(A) scientists learned how to make a synthetic growth hormone, removing it painstakingly
(B) scientists had learned about making a synthetic growth hormone, they had to remove it
painstakingly
(C) scientists learned how to synthesize the growth hormone, it had to be painstakingly removed
(D) learning how to make a synthetic growth hormone, scientists had to remove it painstakingly
(E) learning how to synthesize the growth hormone, it had to be painstakingly removed by scientists

请问这题为什么选C 不选D呀？谢谢

作者: AlienX 时间: 2008-7-9 00:27
D中的it只能指"a synthetic growth hormone", 可是scientists要remove的不是"a synthetic growth hormone"而是"the growth hormone"

作者: luyinan 时间: 2008-7-9 09:10

为什么D中的it只能指"a synthetic growth hormone", a synthetic是修饰 growth hormone的呀，所以应该也指代growth hormone呀。为什么呀？

作者: dingxiang 时间: 2008-7-9 10:00

以下是引用luyinan在2008-7-8 23:36:00的发言：

Before scientists learned how to make a synthetic growth hormone, removing it painstakingly in
small amounts from the pituitary glands of human cadavers.
(A) scientists learned how to make a synthetic growth hormone, removing it painstakingly
(B) scientists had learned about making a synthetic growth hormone, they had to remove it
painstakingly
(C) scientists learned how to synthesize the growth hormone, it had to be painstakingly removed
(D) learning how to make a synthetic growth hormone, scientists had to remove it painstakingly
(E) learning how to synthesize the growth hormone, it had to be painstakingly removed by scientists

请问这题为什么选C 不选D呀？谢谢

主要是it指代的问题，我已经mark出来了，楼主再看看，体会一下

两个it的指代是不同的，导致意思变化，而D是逻辑不通的

作者: luyinan 时间: 2008-7-9 10:09
喔谢谢

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