Do unit tested have to parts a closed and open book test ?

After swimming for hours he was tired what is the personal pronoun in the sentence below

Which sentence uses the denotative meaning of the word blue? i was feeling pretty blue when i lost my favorite earrings. i wore a blue scarf to complement the color of my eyes. the characters in the book all seemed rather blue. the movie’s ending always puts me in a blue mood.

Which must mean almost the same as believed?