key ,answer, way 有什么差别?
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?
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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