1When will the .... take place? (Celebrate)
2It is ...... for you to feel pround. (Nature)
3It is a ..... discovery. People have been waiting for it for a long time! (Science)
4My keys have .... . I do not have the slightest idea where they might be. (Appeared)
5The .... Gallery faces Trafalgar Square. (Nation)
Слова в скобках поставьте в правильную форму.