all of them
Me pregunto que tienen en común todos ellos.
I wonder what they all have in common.
Are they all your friends?
I'm fed up with all of them.
Creo que casi todos ellos tomaron parte en el complot.
I believe almost all of them took part in the plot.
Quiero hablar con todos ellos.
I want to talk to all of them.
They all swim very fast.
They all wear uniforms.