[求助]大全332

freedownload

1.                             His studies of ice-polished rocks in his Alpine homeland, far outside the range of present-day glaciers, led Louis Agassiz in 1837 to propose the concept of an age in which great ice sheets had existed in now currently temperate areas.

(A) in which great ice sheets had existed in now currently temperate areas

(B) in which great ice sheets existed in what are now temperate areas

(C) when great ice sheets existed where there were areas now temperate

(D) when great ice sheets had existed in current temperate areas（B）

(E) when great ice sheets existed in areas now that are temperate

in what are now temperate areas是什么意思，没有办法理解，请求解释这道题，谢谢！

maotian

是说“提出了一个关于一个时期的概念，在那个时期，在现在已是温带的地区有大冰层存在。”


“what” is both the objective of "existed in" and the subject of "what are now temperate areas".