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—Paper ___________ wood. We should not waste paper.
—I agree. I always use __________ sides of paper.

A.is made of; either B.is made from; both
C.makes of; both D.makes from; either

B

解析试题分析:句意:纸是由木头做的。我们不应该浪费纸。我同意。我总是两面都用。be made of 是可以看出原材料的, be made from是不可以看出原材料的,这两个短语的意思都是由……组成。纸是看不出由木头做的,故用be made from。both两者都+名词复数,either两者中的任何一个+名词单数。故选B.
考点:考查近义词组辨析。

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