螃蟹蜕壳后通常会躲起来直到新壳变硬。

Crabs often hide after they have ___sloughed their shells until the new ones harden.

蛇蜕下了旧皮。

The snake ___shed off its old skin.

他疲倦地拖着脚步走过走廊，看起来精疲力尽。

He ___slouched down the hallway, looking completely exhausted.