问几道OG题,谢谢

fern

OG-52.The rising of costs of data-processing operations at many financial institutions has created a growing opportunity for independent companies to provide these services more efficiently and at lower cost.
(A)The rising of costs主名词是RISING
(C)The rising cost主名词是COST
选C的话不是改变了原来的意思了吗,而且应该是RISING导致后面的结果比较说得通啊
可是答案是C,为什么啊?


OG-56 . Architects and stonemasons , huge palace and temple clusters were built by the Maya without benefit of the wheel or animal transport.
(A) huge palace and temple clusters were built by the Maya without benefit of the wheel or animal transport
(B) without the benefits of animal transport or the wheel, huge palace and temple clusters were built by the Maya
(C) the Maya built huge palace and temple clusters without the benefit of animal transport or the wheel
(D) there were built, without the benefit of the wheel or animal transport, huge palace and temple clusters by the Maya
(E) were the Maya who, without the benefit of the wheel or animal transport, built huge palace and temple clusters
E is awkwardly phrased and produces a sentence fragment, because the appositive noun phrase Architects and stonemasons cannot serve as the subject of were the Maya. 这是什么意思呀,是不是因为MAYA 和Architects and stonemasons概念范围不对等所以不能用IS来连啊


OG-67. Congress is debating a bill requiring certain employers provide workers with unpaid leave so as to care for sick or newborn children.
(A) provide workers with unpaid leave so as to
(B) to provide workers with unpaid leave so as to
(C) provide workers with unpaid leave in order that they
(D) to provide workers with unpaid leave so that they can
(E) provide workers with unpaid leave and
So as to,  so…..as to 修饰的是不是都是句子的主语,如果要修饰别的名词就不能用这结构,而要用so…….that+该名词引导的句子对吗?

OG-69. Although she had signed a pledge of abstinence
while being an adolescent, Frances Willard was 35 years old before she chose to become a temperance activist.
(A) while being an adolescent
(B) while in adolescence
(C) at the time of her being adolescent
(D) as being in adolescence
(E) as an adolescent
我想问的是WHILE连接的壮语在GMAT中可不可接受呢,while she was an adolescent.是不是对的,while an adolescent 又可不可以接受呢

fern

没有人指点