70. 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
(E) when great ice sheets existed in areas now that are temperate
正确选项B中有一个what，无论是意思还是词性都觉得难以理解。what are now temperate areas看来是个宾语从句，但是what引导于意思不合啊。where是不是正确的。
求分析，我上来就把B给rule out了，就因为这个what不顺眼...
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发表于 2010-11-7 10:04:01
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