有必要在你的护照上盖章。

It is necessary to ___stamp your passport.

牛奶容器上印有保质期。

Milk containers are ___stamped with a sell-by date.

门上只盖了一个小标志，写着“因维修关闭”。

There was only a small sign ___stamped on the door, saying that it was "closed for repairs".