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将句子中到的错误写在后面的括号中并改正

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Tony has left for haif an hour( ) How long have you joined the army?( ) T hey 've made friends since they came to China.( ) My classmates have bought the computer for two days( ) I think the meeting has started for several minutes.( )
将句子中到的错误写在后面的括号中并改正
解题思路: 如下
解题过程:
1\Tony has left for half an hour( left ——been away )
2\How long have you joined the army?( joined ___ been in )
3\They 've made friends since they came to China.( made friends ___been friends )
4\My classmates have bought the computer for two days( bought____had )
5\I think the meeting has started for several minutes.( started_____been on ) 解析:非延续性动词不能和一段时间连用。
最终答案:略