Question

Which verb agrees in number with its subject? Either my cousins or my sister __________ out at the fair today. A. is helping B. are helping C. were helping D. have been helping

Answer 1

The best answer for this question would be:

C. were helping

The answer is C, because the one noun is a singular while the other one is paired with a plural, so the verb should be in plural form as much as possible.