prep2-21

tylergu

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

C是正确答案

我选的是D，虽然make a synthetic growth hormone比较罗嗦，但用的是相同的主语

如果是

learning how to synthesize the growth hormone, scientists had to remove it painstakingly

语法对吗

snoopy55

D的it指的是合成的生长素，而不是要remove的（天然的）生长素

gonghao

从分词修饰角度来讲，D没错，但是错在逻辑意思，科学家不 painstakingly，而是从体内拿出荷尔蒙是 painstakingly

徙彼南山

科学家只管synthesize,不可能是remove的主语，应该是"doctors" remove it。所以d错。

[此贴子已经被作者于2007-11-6 17:20:55编辑过]

snowofjune

up

weideng

以下是引用gonghao在2007-5-23 23:12:00的发言：

从分词修饰角度来讲，D没错，但是错在逻辑意思，科学家不 painstakingly，而是从体内拿出荷尔蒙是 painstakingly

这个解释很好!!!!!!

Raymond_GMAT

(C) scientists learned how to synthesize the growth hormone, it had to be painstakingly removed

C中it指代growth hormone

(D) learning how to make a synthetic growth hormone, scientists had to remove it painstakingly

D中it指代a synthetic growth hormone，逻辑不合理