When the USA put the first human on the moon, Russia had already sent the first human into space.

After the USA put the first human on the moon, Russia had already sent the first human into space.

Before the USA put the first human on the moon, Russia had already sent the first human into space.

Before the USA had put the first human on the moon, Russia had already sent the first human into space.

The USA put the first human on the moon before Russia had already sent the first human into space.