prep_SC一题不懂，请求帮助

According to one
expert, the cause of genetic irregularities in many breeds of dog is not so
much that dogs are being bred for looks or to meet other narrow criteria as
that the breeds have relatively few founding members.

A.     
the cause of genetic irregularities in many breeds of dog is not so much that
dogs are being bred for looks or to meet other narrow criteria

B.     
the cause of genetic irregularities in many breeds of dog is not as much their
being bred for looks or meeting other narrow criteria as much

C.     
it is not so much the cause of genetic irregularities in many breeds of dog
that they are being bred for looks or meeting other narrow criteria as much

D.    
it is not so much the cause of genetic irregularities in many breeds of dog is
their being bred for looks or meeting other narrow criteria so much

E.     
it is not so much the cause of genetic irregularities in many breeds of dog to
be bred for looks or to meet other narrow criteria

正确答案是：A

这个题目是考比较的，从未划线入手比较快 as that .... ， 前面一定有 that 从句对称平行的

有that 只有C，THAT 使用错误。

比较结构， 从未划线的判断比较关键，这样能节省不少时间

not so much that .... as that

另外OG中还出现了more  becacuse ... than becacuse / ----- 也就是说在than 后出现了连词，基本前面出现的可能比较大

175. Two new studies indicate that many people become obese more due to the fact that their bodies burn calories too slowly than overeating.

(A)  due to the fact that their bodies burn calories too slowly than overeating

(B)  due to their bodies burning calories too slowly than to eating too much

(C)  because their bodies bum calories too slowly than that they are overeaters

(D)  because their bodies bum calories too slowly
                    than because they eat too much   // more because .... than because

(E)   because of their bodies burning calories too
                slowly than because of their eating too
                much

The members of a comparison (more X than Y) should be expressed in parallel form. D, the best choice, correctly uses parallel clauses introduced by because. The clauses them­selves are clear and direct. Choice E uses parallel forms, but the convoluted structures are awkward and wordy. Furthermore, the word bodies would need an apostrophe (bodies') since it is the logical subject of the gerund burning (that is, it answers the question, "Whose burning?"). A, B, and C do not use parallel forms for the two members of the comparison. In addition, A and B use due to unidiomatically to mean because; properly used, due to is synonymous with attributable to.

记得GWD中好像也出现了这样的比较结构。 LZ 可以查查