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