这些农民是种植水稻的专业户。

These ___farmers specialize in growing rice.

这些新品种果树是产量很高的作物，即使在干旱地区也能丰收。

These new fruit trees are excellent ___croppers, producing abundant harvests even in dry regions.

他在冰面上滑了一跤，摔得很重。

He took a bad ___fall on the icy pavement.