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Is your washing machine ____________ working?
A.don’tB.doesn’tC.won’tD.not
D

试题分析:句意:你的洗衣机没有在工作吗?进行时态的肯定句,变疑问句,把 is 提到主语前面。如果是否定句,可以只提前is, not 位置不变。故选D。
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