The witness testified in court.

I did a test to see if I'm allergic to pollen.

Heads are important for scientific research.

The hotheads are having a heated discussion.

Empty heads cannot understand the complexity of the situation.

The heads of dicks were everywhere during the party.

Bridgeheads have been established along the river to defend the territory.

The shock troops are ready for the attack.

Two heads are better than one.