A. thirteenB. seventeenC. eighteenD. twelveE. twentyF. fifteen
1.I have seven books, _______ pens and four rulers. 2.I have nine pencils, three pens and _______ books. 3.I have two pencil boxes, _______ crayons and five erasers. 4.I have _______ pencils, six rulers and eleven crayons.