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[Sentence Correction]
试题详情
题目：
For protection from the summer sun, the Mojave lived in open-sided, flat-topped dwellings known as shades, each a roof of poles and arrowweed supported by posts set in a rectangle.
选项:
A、each a roof of poles and arrowweed
B、each a roof of poles and arrowweed that are being
C、with each being a roof of poles and arrowweed
D、with roofs of poles and arrowweed to be
E、with roofs of poles and arrowweed that are
答案:
A
提问：
a roof of 和roofs of的区别及意思？为什么这里不可以用伴随？例如选择D
解答：
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