再问885section14-13

snow_mountain · 发表于 2004-3-17 11:19:00

    请教885section14-13

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

答案B。我的问题是，为什么这里用过去式，而不用过去完成式，不是前面有led 提示吗？表明在study led 之前 exist 这个动作就结束了？

iamwwh · 发表于 2004-3-17 11:35:00

我想是因为前面an age in which表示过去的一个时间吧, 所以用一般过去时

dansy · 发表于 2004-3-17 14:22:00

bryony，这题考的不是时态问题。A中now和currently重复。C罗嗦，E中now的位置不对。还有就是in which优于when(介词加whcih优先)，在in which用在句子没有错误时。

再问885section14-13

再问885section14-13

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