——of the land in that country——covered with trees and grass.

——在那个国家的土地——长满着树和草
再问： A.Three sevevnth;is
再问： B.Three sevevnths;is
再问： C.Three sevevnth;are D.Three sevevnths;are
再问： 选哪个？！求告诉。
再答： 选择C。 若分数所在of短语做主语，谓语依照of后的名词而定： two fifths of the students are on time. (指名词复数时，谓语用复数。） two fifths of the land is polluted. (指不可数时，谓语用单数。） Three sevevnths of the land in that country 那个国家的七分之三的土地，土地不可数
再问： 谢谢！！！！！！！！