to shake or tremble
quiver
He ____when it is cold outside.
quivers
My dad is always sleepy in the morning because he works the night ____ .
shift
When police officers ____, they watch over an area to make sure it is safe.
patrol
to bite quickly
snap
skill
ability
walk through an area to watch it or guard it
patrol
The dogs _____ at each other when they see food.
snap
Ants have the ______ to lift heavy items.
ability
the period of time a worker does his or her job
shift