22．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
答案选E，OG的解释是：Parallelism+Rhetorical construction. In this sentence, the word partly
is used to introduce both reasons; the phrase
to acquire certain characteristics is clear and concise.
不太明白，这里parly后面跟不定式怎么能和because组成平行结构呢？
27．Minnesota is the only one of the contiguous forty-eight states that still has a sizable wolf population, and where this predator remains the archenemy of cattle and sheep．
(A) that still has a sizable wolf population，and where
(B) that still has a sizable wolf population，where
(C) that still has a sizable population of wolves，and where
(D) where the population of wolves is still sizable；
(E) where there is still a sizable population of wolves and where
答案选E，OG解释是：Parallelism. 没什么问题。但是C的解释我看不明白，while grammatically correct, this sentence needs a conjunction to show the logical relationship between the two independent clauses rather than the semi-colon that implies their equality. 里面的所谓的conjunction应该是怎么样的呢，为什么不能选C，如果要使用这样用semi-colon的形式，这句应该怎么改
谢谢
22题，后面应该是解释他们杂交的目的，然后两个目的平行，表示目的要用不定式to do，因为后面and紧随partly，所以前面肯定也是partly勒，至于你说的那个～我想可能是第一个partly后面省略勒because crossbreeding is said ，不过好像没见过在前面就省略的哦～～期待NN赐教～
27题我觉得是不是非限定性定语从句的问题...画线句子后面是对前面概念的一个补充，用that就表示限定性定语从句勒～所以错勒...期待NN赐教～
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