When we often interrupt a person who's speaking to us, we're likely to give the impression that
a. we're knowledgeable about the topic of discussion.
b. we're really interested in what the speaker is saying.
c. we want to hear more about the topic being discussed.
d. we aren't really listening to what the speaker is saying.

there is no passage what do you mean?

give me the passage and i will answer your question

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.