He is my best friend.

His goal was truly a miracle play.

In order to overcome that impediment, it is necessary to do your best.

His plan was obstructed by the sudden rain.

Einstein proposed the theory of relativity.

His actions always have a duality.

My younger brother caught the influenza.

This material has high corrosion resistance.

The prevention of venereal diseases is most important in safe sexual behavior.

This equation has homogeneity.