[求助]OG

knight

204. 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.

A)in part that their steers should acquire certain characteristics
B)in part for the acquisition of certain characteristics in their steers
C)partly because of their steers acquiring certain characteristics
D)partly because certain characteristics should be acquired by their steers
E)partly to acquire certain characteristics in their steers
我认为D平性对称，感觉很好啊，为什么错。谢谢指点！

gigi

D表面上是形式平性对称，感觉很好，可是acquire certain characteristics in their steers 这个动作是由cattle breeders 完成的，不定式表目的。。是cattle breeders 做以下动作have increasingly used crossbreeding 要达到某种目的-acquire certain characteristics in their steers
d 逻辑上不可理解呀

tongxun

而且D 的被动表达十分罗嗦。