标题: 菜鸟提问------时态求救（含kaplan解释）～～～ [打印本页] 作者: fannybeibei 时间: 2010-2-14 16:14 标题: 菜鸟提问------时态求救（含kaplan解释）～～～ 59. 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* concept of an age in which great ice sheets' existed in now currently temperate areas.
A) in which great ice sheets had existed: 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
我选了d，觉得是过去完成时？？为什么不可以啊？ kaplan说， Note the difference in meaning between these two sentences: The Civil War had ended when Lincoln was shot. = The war was over by the time of Lincoln’s death. The Civil War ended when Lincoln was shot. = The war ended when Lincoln died.
