With a tag:
John must be at school, ______?
With a tag:
John must be at school, ______?
【正确答案】:mustn’t he/isn’t he
【题目解析】:当must做推测意义“一定是;必定”讲时,反义疑问句可以用must/mustn’t或根据must后的动词原形选用相应的形式。
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