几道gwd题 帮帮忙 感谢

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？