211. The period when the great painted caves at Lascaux and Altamira were occupied by Upper Paleolithic people has been established by carbon-14 dating, but what is much more difficult to determine are the reason for their decoration, the use to which primitive people put the caves, and the meaning of the magnificently depicted animals.
(A) has been established by carbon-14 dating, but what is much more difficult to determine are (B) has been established by carbon-14 dating, but what is much more difficult to determine is 应用上面的理论,无法理解答案为什么是B不是A,the reason for their decoration, the use to which primitive people put the caves, and the meaning of the magnificently depicted animals.三个并列做主语,很显然主语用复数啊,NN们解答一下,看了一个小时,越看越糊涂. i choose b, why not b??? |