建筑工人们每天都必须戴上安全帽才能进入工地。

Construction workers must wear their ___helmets before entering the site every day.

工人们正在修理这艘船的船体。

Workers are repairing the ___hull of the ship.

我公寓的casco保险涵盖火灾和洪水造成的损失。

The ___casco insurance for my apartment covers damage from fire and floods.