爷爷用镰刀收割稻田里的稻穗。

Grandpa cut the rice stalks in the field with a sharp ___sickle.

这个国家的国徽上有一把锤子和镰刀，象征着工农联盟。

The national emblem of this country features a hammer and ___sickle, symbolizing the alliance of workers and peasants.

夜空中的新月像一把银色的镰刀。

The new moon in the night sky looks like a silver ___sickle.