B.larger; less.The world's population is growing larger,and there is less land and water for growing rice.世界人口越来越多,可是用于生长稻米的土地和水却越来越少.large population.大量的人口,固定搭配.lan...land and water两样不视为复数吗？两个不可数单词放在一起还是不可数啊。不视作复数。请采纳。谢谢。^_^ 祝学业有成。