"Millionaire models, remarked Alan, 'are rare enough; but, by Jove, model millionaires are rarer still!"" Explain
what this means in your own words?

it is a hope this 's

i cannot see any of the options

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.