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The period when the great painted caves at Lascaux and Altamira were occupied by Upper Paleolithic peoples has been established by carbon dating, but what is much more difficult to determine are the use to which primitive peoples put the caves, the reason for their decoration, and the meaning of the magnificently depicted animals. A.
has been established by carbon dating, but what is much more difficult to determine are B. have been established by carbon dating, but what is much more difficult to determine are C. have been established by carbon dating, but that which is much more difficult to determine is D. has been established by carbon dating, but what is much more difficult to determine is E. are established by carbon dating, but that which is much more difficult to determine is
我选了A，但答案是D，为什么。我是看到了determine后跟了 the use.....the reason.....and the meaning, 所以觉得determine后要 are的说，哪位好心人给指导下，谢谢~~~~ | 
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发表于 2009-3-4 19:15:00
楼主
发表于 2009-3-21 00:56:00
