◎ 题干
Since it will take years to know the effect of genetically modified food, it’s more sensible to give it a second thought before we eat it,        it?
A.isn’t B.is C.won’t D.will
◎ 答案
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◎ 解析
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◎ 知识点
    根据魔方格专家分析,试题“Since it will take years to know the effect of genetically modified food, it’s more sensible to give it a second thought before we eat it,it?A.isn’tB.isC.won’…”主要考查了你对  【一般疑问句】【特殊疑问句】【反意疑问句】  等知识点的理解和应用能力。关于这些知识点的“档案”,你可以点击相应的链接进行查看和学习。