几道gwd题 帮帮忙 感谢

dragon0501

GWD1-Q7:

A recent review of pay scales indicates that CEO’s now earn an average of 419 times more pay than blue-collar workers, compared to a ratio of 42 times in 1980.

A.      that CEO’s now earn an average of 419 times more pay than blue-collar workers, compared to a ratio of 42 times

B.       that, on average, CEO’s now earn 419 times the pay of blue-collar workers, a ratio that compares to 42 times

C.      that, on average, CEO’s now earn 419 times the pay of blue-collar workers, as compared to 42 times their pay, the ratio

D.      CEO’s who now earn on average 419 times more pay than blue-collar workers, as compared to 42 times their pay, the ratio

E.       CEO’s now earning an average of 419 times the pay of blue-collar workers, compared to the ratio of 42 times

A哪错了，为什么选C，C 的as做什么成份，是什么用法？

GWD1-Q32:

To develop more accurate population forecasts, demographers have to know a great deal more than now about the social and economic determinants of fertility.

A.      have to know a great deal more than now about the social and economic

B.       have to know a great deal more than they do now about the social and economical

C.      would have to know a great deal more than they do now about the social and economical

D.      would have to know a great deal more than they do now about the social and economic

E.       would have to know a great deal more than now about the social and economical

为什么要加would，做什么成分，为什么than后面补的助动词是do 而不是would

GWD7-Q39:

Seldom more that 40 feet wide and 12 feet deep, but it ran 363 miles across the rugged wilderness of upstate New York, the Erie Canal connected the Hudson River at Albany to the Great Lakes at Buffalo, providing the port of New York City with a direct water link to the heartland of the North American continent. B

A.      Seldom more than 40 feet wide and 12 feet deep, but it ran 363 miles across the rugged wilderness of upstate New York, the Erie Canal connected

B.       Seldom more than 40 feet wide or 12 feet deep but running 363 miles across the rugged wilderness of upstate New York, the Erie Canal connected

C.      It was seldom more than 40 feet wide and 12 feet deep, and ran 363 miles across the rugged wilderness of upstate New York, but the Erie Canal, connecting

D.      The Erie Canal was seldom more than 40 feet wide or 12 feet deep and it ran 363 miles across the rugged wilderness of upstate New York, which connected

E.       The Erie Canal, seldom more than 40 feet wide and 12 feet deep, but running 363 miles across the rugged wilderness of upstate New York, connecting

seldom不是否定词，所以我认为应该用and 但答案是or,why??

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GWD7-Q40:

Since February, the Federal Reserve has raised its short-term interest rate target five times, and because of the economy’s continued strength, analysts have been predicting for weeks that the target will be raised again in November.C

A.      because of the economy’s continued strength, analysts have been predicting for weeks that the target will

B.       with the economy’s strength continuing, analysts predicted for weeks that the target

C.      because the economy continues strong, analysts predicted for weeks that the target would

D.      due to the economy’s continued strength, analysts have been predicting for weeks that the target

E.       due to the fact of the economy’s continued strength, analysts predicted for weeks that the target will

这里为什么不忠实原文时态涌现在完成进行式，而是改成了过去式呢？

GWD-10-Q37:GWD-11-26

On Earth, among the surest indications of sunspot cycles are believed to be the rate that trees grow, as seen in the rings visible in the cross sections of their trunks.E

A.      On Earth, among the surest indications of sunspot cycles are believed to be the rate that trees grow

B.       On Earth, among the surest indications of sunspot cycles are, it is believed, the rate of tree growth

C.      On Earth, the rate at which trees grow is believed to be among the surest indications of sunspot cycles

D.      Among the surest indications on Earth of sunspot cycles, believed to be the tree growth rate

E.       Among the surest indications on Earth of sunspot cycles is believed to be the rate at which trees grow

我觉得答案是C,among……能做主语么？

T-3-Q2.
                        

As the honeybee’s stinger is heavily barbed, staying where it is inserted, this results in the act of stinging causing the bee to sustain a fatal injury.E

A.      As the honeybee’s stinger is heavily barbed, staying where it is inserted, this results in the act of stinging causing

B.       As the heavily barbed stinger of the honeybee stays where it is inserted, with the result that the act of stinging causes

C.      honeybee’s stinger, heavily barbed and staying where it is inserted, results in the fact that the act of stinging causes

D.      the heavily barbed stinger of the honeybee stays where it is inserted, and results in the act of stinging causing

E.       the honeybee’s stinger is heavily barbed and stays where it is inserted, with the result that the act of stinging causes

我选的是D,请问哪错了？

georgetseng

1-Q7： A)中419 times more pay than blue-collar workers应为419 times more pay than THAT of blue-collar workers. as compared to = compared to，记住就行。
C)并不完美，其中 as compared to..., a ratio...显得好罗嗦，不过并列结构满足了。
问了几个老美，都觉得A)读起来更顺，但好像GMAT会prefer A). 当然，老美GMAT比不上我们...
GMAT中考的more...than...或as...as...偶尔会比较怪异。其实， ceo's earn more pay than workers (do) 或ceo's earn more pay than that of workers语法上都对，但加上了an average of后，more严格修饰pay （而不是修饰earn)，所以，从并列上来讲，必须用an average of 49 times more pay than that of workers；进一步解释，可以说I have a bigger table than (that of) his， 但按照GMAT语法，不能说I have a bigger table than he does （虽然日常中都会这么说）； I have fewer tables than he does是日常的说法，但按GMAT的并列要求，应该说I have fewer tables than those of his，可是并没有人这样说 - 很多有歧义的比较并列结构都可以简化归结于这种情况，而这种情况下应该选哪个其实都是我们都在猜（尽管会有人很肯定地告诉你一个答案），官方答案是什么根本没人知道(模拟题里的答案一般都不会有歧义）。但在95%以上的情况下，GMAT考的并列结构是很明显，所以碰上有歧义的做错了也就算了。


GWD1-Q32: "would"-虚拟语气；用will也行，只不过would更委婉；do代表know
GWD-10-Q37:GWD-11-26: 倒装句。a is amoung b = amoung b is a
T-3-Q2： results in something doing something错了；stinger results in逻辑错了，是stinger的什么什么results in