prep-2-21

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

 选c 怎么可能？？

 我选d。。。

 who can help me?? thanks a lot

(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

==》体会一下意思，原句是synthesize  hormone 还是make hormone ?

 thanks

不是吧...我还是觉得D好~~~大家讨论一下~~~

个人觉得D好。

C的it指代容易产生歧义。如果按照就近指代的原则，it应指代合成的荷尔蒙，而合成的荷尔蒙怎么能从死人尸体中取得呢？逻辑意思不对。

就是因为人体不可能有"合成的荷尔蒙" (人体的都是"天然"的荷尔蒙),所以it不能指代"合成的荷尔蒙"(D),而只能指代"荷尔蒙"(C).

这句是说,在科学家不会合成 Growth 荷尔蒙之前,只能从尸体上挖growth荷尔蒙.

如果是D,就是说: 科学家在学会制造"合成荷尔蒙"之前,不得不从尸体上挖"合成荷尔蒙".----->但是人体没有合成的,都是天燃的

这题其实有点欺负人,对付俺们这些非英语母语的人来说

B为什么不对？因为时态不对吗？

还是没有明白C，D的区别

sch的头像印象好深，你还考吗？