In response to the enemy's attack, we are considering a retreat.

In physics class, I learned about the properties of convex mirrors.

He conducted an experiment using a spherical lens.

When the sun rises, a new day begins.

The eighth day of every month is my birthday.

Our picnic is scheduled for the ninth.

Our monthly meeting is scheduled for the seventh day of the month.

He was walking around the room stark naked.

Ousa goes for a walk with her dog every morning.

The volcano erupted.