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[Sentence Correction]
试题详情
题目：
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.
选项:
A、has been established by carbon-14 dating, but what is much more difficult to determine arehas been established by carbon-14 dating, but what is much more difficult to determine is
B、have been established by carbon-14 dating, but what is much more difficult to determine is
C、have been established by carbon-14 dating, but what is much more difficult to determine are
D、are established by carbon-14 dating, but that which is much more difficult to determine is
答案:
B
提问：
为什么选is而不是are，前后单复数要保持一致？
解答：
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提问：
为什么选is而不是are，前后单复数要保持一致？
解答：
点赞0
阅读2127
提问：
A与B选项中的are和is如何判断？
解答：
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