where would you like to send it?
你想往哪儿寄?
I wrote her several letters, but she never wrote back.
我给她写了很多封信,可是她一封都没回过。
Be sure to put down the address of the receiver clearly.
注意要把收件人写清楚.
Put down就是”写下”的意思,是正式用语.
Will you put down your address here?
把你的地址写在这儿好吗?