问题补充：
—Do you believe that paper is made wood ?
—Yes, I do . And you can see that books are made paper.
A. from , from
B. from , of
C. of ,from
D. of ,of
答案：
A. from , from
(答案→)B. from , of
C. of ,from
D. of ,of
解析： be made of 由……制成，原材料性质不发生变化，只在形状大小上变化，即物理变化。be made from,由···制成，原材料发生化学变化，或用途发生改变。句意：你相信纸是由木头制成的吗？是的。那你能看到书是由纸制成的吗？木头制纸，发生化学变化。纸制书，物理变化。故选B。
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