猎人把刀插回刀鞘，继续前行。

The hunter ___sheathed his knife and continued walking.

登山杖的金属尖端用橡胶套保护起来以避免刮伤地面。

The metal tip of the hiking pole was ___sheathed in rubber to prevent scratching the ground.

她强忍着泪水，尽量保持冷静。

She tried to ___sheathe her tears and stay composed.