题目内容

16.When asked about the canned fresh air,Chen Guangbiao said it didn't matter _______it sold well or not,just for friendly environment.(  )
A.howB.whetherC.whenD.if

分析 当被问及罐装的新鲜空气时,陈光标说是否畅销这并不重要,只要环保.

解答 答案:B.
分析句子结构可知,本题中 _______it sold well or not是主语从句,前面的主句it didn't matter中的it是形式主语,主语从句中不缺少成分,且句中有or not,whether…or not固定搭配,是否…,符合句意"陈光标说是否畅销这并不重要,只要环保.",if不可以引导主语从句,故选B.

点评 本题考查名词性从句.首先看从句是否在整个句子中起名词的作用(连接词后面即从句),然后要判断它是哪个名词性从句.名词性从句是主句的一部分,可以充当主语、宾语、表语、同位语.再根据从句中缺少何种成分(主语、宾语、定语、状语等)和所缺成分的属性(人或物)来决定连接词的应用.

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