They have pasted up a notice on the wall

他们在墙上贴了一张布告。

paste up:fasten with paste to a surface用浆糊把…贴在上面

再如:

The printer pasted up the first chapter to show the author what his book would look like.

印刷工把书的第1章粘贴好了，让作者了解他的书会是什么样的。