prep1-125 没人问过overseas的词性？？

lxzdong

125. (31137-!-item-!-188;#058&004397)

The computer company registered a $16 million net loss for the year, largely because it was
profitable only overseas, where much of their profits were used for paying higher taxes, while continuing to lose money in North America.

(A) where much of their profits were used for paying higher taxes, while continuing
(B) where much of their profits went to pay higher taxes, as they continued
(C) where much of its profit went to pay higher taxes, while it continued
(D) with much of their profits going to pay higher taxes, while continuing
(E) with much of the profit used for paying higher taxes, as it continued

答案是c，弱问一下: overseas不是只有adj.和adv.的词性吗，为什么可以用where修饰作定从捏？

zoechou

同问

overseas这里应该是副词
怎么做先行词呢

zoechou

请教大家了

多谢