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1.They have studied English since 8 years.2.The1.They have studied English since 8 years.2.The class has ended for ten minutes.两个句子改错.很着急

题目详情
1.They have studied English since 8 years.2.The
1.They have studied English since 8 years.
2.The class has ended for ten minutes.
两个句子改错.很着急
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答案和解析
1把since改为for2.把ended改为been ending