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题目内容
（华北水利水电大学英语）
Thepostman______youlettersintomyletterbox.Itstooboring.( )
·isalwaysputting
·alwaysputs
·hasbeenputting
·willput
·isalwaysputting
·alwaysputs
·hasbeenputting
·willput
参考答案
