Look！The ground is wet.It must have rained last night，________？A．hasn’t itB．didn
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Look！The ground is wet.It must have rained last night，________？| A．hasn’t it | B．didn’t it | | C．mustn’t it | D．hadn’t it |
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答案
| B |
解析
由last night及must have rained可知此处是对过去情况的猜测，下雨是过去的事实，所以反意疑问句的助动词用did，并且根据前肯后否的原则，反意疑问句应该用否定形式，C项正确。句意为：看！地面湿了，昨天晚上肯定下雨了，不是吗？ |
举一反三
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