反义疑问句:Everyone has a flower in his hand,----?用haven't they 还

has 作实义动词,答案是 don't they ?
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再问： 答案只有 haven't they 和didn't they 应该怎么选
再答： 如果不出错，只能选 haven't they ; 因为have/　has　作为‘有’时，基否定式也可用haven't / hasn't ，不过一般是加助动词较好， has 是一般现在时，不能用didn't they