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题库 / OG2017V-SC-218
In recent years cattle breeders have increasingly used crossbreeding, in part that their steers should acquire certain characteristics and partly because crossbreeding is said to provide hybrid vigor.
in part that their steers should acquire certain characteristics
in part for the acquisition of certain characteristics in their steers
partly because of their steers acquiring certain characteristics
partly because certain characteristics should be acquired by their steers
partly to acquire certain characteristics in their steers
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这题我被暴击了！以为平行最好是句子和句子平行；结果答案来个不定式和句子平行！
A In part should be partly. Use of the relative clause that their steers should
acquire . . . is ungrammatical.
B In part should be partly. Use of prepositional phrases is wordy and
awkward.
C Because of suggests that crossbreeding has occurred because the steers
have already acquired certain characteristics.
D Passive voice should be acquired by is awkward and illogical.
E Correct. In this sentence, the word partly is used to introduce both
reasons; the phrase to acquire certain characteristics is clear and concise.
做目的状语use sth to do sth =use sth for doing，托福里说 in part =partly. B and E 如何选择？ 如果主句发生，变化部分acquire 一定发生，约束力强，所以选to do, 这样理解对吧？
续：如果理解成小公牛，那么小公牛就可以acquire呀
你可以观察一下选项DE，真正的差距是，选项E是一个目的状语，acquire的逻辑主语是cattle breeders。如果补全就是：
cattle breeders acquire certain characteristics in their steers.
再观察D选项：
certain characteristics should be acquired by their steers.
两个选项真正的差距在于，D中没有说明是谁想让小牛们获得这些新特征，而选项E指明是cattle breeders想让小牛获得特征的。你想，划线部分必须要求和In recent years cattle breeders have increasingly used crossbreeding形成因果或目的关系，如果不指明是cattle breeders想让小牛获得特征，则划线部分和主句之间无法具备因果关系~
只能说“因为养牛者想让小牛获得新特征，所以他们会用杂交这个技术”。不能说“因为小牛可以获得新特征，所以养牛者用杂交这个技术”。
哦哦，谢谢~
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老师，我查了网上的一种说法，说D：选项除了错在should 使用不当外，还错在steers 不能acquire，请问这里的steers 应理解为breeders 的指引，还是理解为小公牛呢?