作业帮一道英语选择：He__A__in this unit since he graduated from ECNU.如题 谢谢了
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一道英语选择：He__A__in this unit since he graduated from ECNU.如题 谢谢了
一道英语选择：He__A__in this unit since he graduated from ECNU.如题 谢谢了
一道英语选择：He__A__in this unit since he graduated from ECNU.如题 谢谢了
题中出现since这种提示性词 结合句意选A 现在完成时 不选B是因为过去完成时是过去的过去 此题中since如改成before则可以选B C、D就不用说了吧