Polio, although it is eradicated in the United States, it continues elsewhere and is able to be brought into the country by visitors.
(A) Polio, although it is eradicated in the United States, it continues elsewhere and is able to be
(B) Polio, although eradicated in the United States, it still continues elsewhere and can be
(C) Although still continuing elsewhere, polio has been eradicated in the United States and could be
(D) Although having been eradicated in the United States, polio still continues elsewhere and is capable of being
(E) Although eradicated in the United States, polio continues elsewhere and could be
我想问一下，D中的having been eradicated作为modifier有问题吗？在一个论坛上看到一个说法：
Having + past participle is used to indicate an action that:
-- is completed before the primary action attributed to the modified noun
-- provides context for the primary action attributed to the modified noun
那这里说eradicated发生在continues和be brought前，应该也make sense吧，请牛牛指教！作者: melodyflying 时间: 2013-1-29 21:31
