问题补充：
This book is made paper and the paper is made wood.
A. of; of
B. of ; from
C. from; of
D. from; from
答案：
A. of; of
(答案→)B. of ; from
C. from; of
D. from; from
解析：此题重点考查be made of和be made from的区别，两者都表示有…制成，前者表成品中能看出原材料，后者表示成品中看不出眼材料。
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