题目内容
15.-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 |
分析 -纸是由木头制成的.我们不应该浪费纸张.
-我同意.我总是使用纸的两面.
解答 答案:B be made of由什么制成,能直接看出原材料,指物理变化;be made from由什么制成,不能直接看出原材料,指化学变化.根据Paper ______ wood可知纸是由木头制成的,看不出原材料,所以应该用be made form,此句为一般现在时态,主语为不可数名词paper,所以用is made from;根据We should not waste paper及作者的回答I agree可知对方同意其节约纸张的想法,所以可以推测出她应该使用纸的两面,应该用both,指两者都;而either指纸其中的任何一面,不符合语境.综合以上分析,故选B.
点评 本题要注意相近短语be made of和be made from的区别;以及both和either的区别.做题时联系语境选择符合句意的选项.
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