1. What immediately precedes Jane hearing Edward's voice? The death of Mrs. Reed
The revealing of Jane's true name with St. John
The splitting of Jane's inheritance
O Jane's acceptance of St. John's proposal
(Jane eyre)

yes, it can be both.

the answer is:

when will (v) the books (n) be (v) due?

nouns refer to people (other than pronouns), places and things, whereas verbs describe actions and are usually part of the predicate of a sentence. finally, pronouns can work as nouns and identify the participants in speech.

in the example sentence, "will" is a verb part or auxiliary verb, "be" is an infinitive verb and "books" is a plural noun.