Choose the prepositions in the following sentence. more than one preposition may be in each
sentence.
sometimes, high school courses like advance algebra and physics can be difficult because good
performance in time demands that you memorize many formulas.
a. can
b. in
c. time
d. like
e. be

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.