They had to walk here, they?A. mustn't B. did C. didn't D. hadn't C [解析]句意:他们不得不步行去那里.是吗?mustn't禁止.不应该,这里是反义疑问句.陈述部分有have to +v. .疑问部分常用don't +主语.如:We have to get there at eight tomorrow, don't 题目和参考答案——青夏教育精英家教网—

题目内容

They had to walk here, ___ they?

A. mustn't B. did C. didn't D. hadn't

C 【解析】句意：他们不得不步行去那里，是吗？mustn't禁止，不应该；这里是反义疑问句，陈述部分有have to +v. (had to + v.)，疑问部分常用don't +主语（didn't +主语）。如：We have to get there at eight tomorrow, don't we?因为前面是had to，所以后半部分用didn't，故选C。

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