问题补充：
The Great Wall was made not only by , but also the flesh and blood of men.
A. earth and stone, millions of
B. earths and stones, millions
C. the earth and stone, million of
D. the earths and stones, millions
答案：
(答案→)A. earth and stone, millions of
B. earths and stones, millions
C. the earth and stone, million of
D. the earths and stones, millions
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