问题
选择题
Books are made __________ paper while paper is mainly made __________ wood.
A．of; of
B．from; from
C．of; from
D．from; of
答案
答案：C
能看出原材料用be made of；不能看出原材料用be made from，故答案选C。
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Books are made __________ paper while paper is mainly made __________ wood.
A．of; of
B．from; from
C．of; from
D．from; of
答案：C
能看出原材料用be made of；不能看出原材料用be made from，故答案选C。