题目内容
---Why did you come back so late?
---I met one of my old friends__________. So we talked for a while.
A. by hand B. by mistake C. by accident D. by the way
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题目内容
---Why did you come back so late?
---I met one of my old friends__________. So we talked for a while.
A. by hand B. by mistake C. by accident D. by the way