brandicalderon brandicalderon 02-03-2017 English contestada 18. Which word best completes the sentence? Jamaal and _____ are exercising. I me 19. Which sentence has the correct subject-verb agreement? Heavy rains or fast-melting snow causes floods in many parts of the world. Heavy rains or fast-melting snow cause floods in many parts of the world. 20. Which sentence has the correct subject-verb agreement? Lightning bolts flash across the sky. Lightning bolts flashes across the sky.