Where you (to find) this brooch? It's mine! - You not (to see) the notice on the
school's internet site about the brooch yet? I (to wait) for three weeks. Today I
(to put) it on my dress. Now, here it is, take it.

Нужно поставить или present perfect или past simple

Where did you find this brooch? It's mine. - Haven't you seen the notice on the school 's Internet site about the brooch yet? I have been waiting for three weeks. Today I have put it on my dress. Now,here it is, take it.