Correct the sentence by selecting the proper pronoun usage.

Two of the best singers were he and she.

Since the sentence has a compound subject (he and she), the pronoun that would correct the sentence is "they". So the correct sentence would be, "Two of the best singers were they". We used the pronoun "they" instead of "them" because it is the subject of the sentence. Subject pronouns include I, you, he, she, they, we and it.