What have you done______my pen,Mother?I've put it______(填介词)后面一个空换一个介词

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What have you done______my pen,Mother?I've put it______(填介词)
后面一个空换一个介词

with down
后面如果要换一个的话就是 put it away 把钢笔收起来了

What have you done___with___my pen,Mother?I've put it___down___(填介词)

of down