I submitted my letter of resignation today.

This table is sturdy and will last a long time.

This lava is something that erupted from a volcano.

He entreated his boss to get that job.

He entreated her to come back.

He was repairing the road using a jackhammer.

This rock drill is very efficient and can quickly cut through rock.

The bedrock of this area is very hard.

The compound eyes of insects are made up of many small lenses.

Many insects have simple eyes.