根据句意，用括号内所给单词的适当形式填空。

1. Zhang Yimou is one of the world's famous _________ (direct).

2. What an _________ (enjoy) journey we had yesterday!

3. The story _________ (it) is really interesting, but the actors are just-so-so.

4. We all think it _________ (use) to ask him to take this job, for he isn't interested in it.

5. The famous writer lives on the _________ (twenty) floor of the tall building.