long ago 和 long before Mrsmith said that he had been to shenzhen----------A once amonth B after a month C long ago D long before这道题题我知道A和B 是肯定排除的,long ago 和 long before怎么去区别啊,他们都是说以前的意思

来源：学生作业帮助网编辑：作业帮时间：2024/11/30 18:37:51

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