Exercise 1 Draw one line under the simple subject and two lines under the correct verb form o o r s in parentheses. s a l c r o f e Agriculture (remains, remain) vital to the interest of every person. c u d o r p e 1. The United States still (produces, produce) a majority of the world's food supply. r o t d e t n 2. Modern farms (has, have) become more efficient than ever