Question

We bought four detective books novels but none of them _______ cheap​

Answer 1

Answer:

hii ☺

here's your answer !!

We bought four detective books and novels but none of them were cheap

hope that helps uh..☺

Answer 2

Answer:

We bought four detective books novels but none of them were cheap

Explanation:

As you can see, the sentence is in the past tense, and 'them' is plural so were is right.