请教prep-1-7

Obtaining an investment-grade rating will keep the county's future borrowing costs low, protect its already-tattered image, and increase its ability to buy bond insurance.

(A) Obtaining an investment-grade rating will keep the county's future borrowing costs low, protect

(B) To obtain an investment-grade rating will keep the county's future borrowing costs low, and protect

(C) Having obtained an investment-grade rating will, in keeping the county's future borrowing costs low, protect

(D) To obtain an investment-grade rating would keep the county's future borrowing costs low, protecting

(E) Obtaining an investment-grade rating, keeping the county's borrowing costs low, would be protecting

这题根据平行能很快得到答案A

不过我想问题目中的its already-tattered image和ita ability中的its是指country吧？那划线句子中的country's不是不能作为回指对象吗？

it不能回指country没错，但是这里是its，正好匹配contry's

代词 属格和原型的用法还是不一样的。

alohabrian兄，依然活跃，甚幸啊，呵呵