Question

read the paragraph. 1 our house was once a stop on the underground railroad. 2 it was common for an enslaved person to stop there on their way to the north. 3 the underground railroad were a network of hiding places. 4 the cellar beneath our house has a secret door that was installed to trick enslavers. which sentence has a subject - verb agreement error? sentence 1 sentence 2 sentence 3 sentence 4

Explanation:

Subject-verb agreement requires singular subjects to take singular verbs. In sentence 3, "The Underground Railroad" (singular) uses "were" (plural verb), causing an error.

Answer:

sentence 3