(What's the difference if "in" is taken off) and isn't it different from "into"? 'In' is not necessary, but it stresses that the receipt is being returned to its 'origin'. We send things 'in' to some sort of central location.
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moon7296Why "in" is added in B?(What's the difference if "in" is taken off) and isn't it different from "into"?'In' is not necessary, but it stresses that the receipt is being returned to its 'origin'. We send things 'in' to some sort of central location.