Masato is my best friend.

A tautology refers to a logical formula that is always true, no matter what values are substituted.

The sphericity of this object is very high.

Please stop the car because it's raining.

I go to the library every month.

The train stopped at the station.

We joined the school's cheerleading squad.

A new project has begun.

I think the Japanese education system needs reform.

He is very tall.