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一、阅读下面的句子,注意两句话的区别 John went to the station by car to meet Mary,so she didn’t need to walk back home. 约翰开车去车站接玛丽了,所以她就不必步行回家了。 John went to the station by car to meet Mary,so she needn’t have walked back home. 约翰开车去车站接玛丽了,所以她本来不必步行回家的。 答案:略