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key,answer,way有什么差别?Watercostsmoney.Insomeplaceswaterishard16.What17whenatownhastheseproblems?AsmalltowninCaliforniafoundahappy18.18.A.keyB.answerCansweringD.way为什

题目详情
key ,answer, way 有什么差别?
Water costs money.In some places water is hard___16__ .What __17__ when a town has these problems?A small town in California found a happy __18__ .
18.A.key B.answer C answering D.way
为什么选B,不选D呢?
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答案和解析
估计16空应该是填problem,所以,18空才会有answer与之对应.
这个是有前后对应的,应该根据上下文来选择.
词义可能会一样,但对应的词是不一样的.