The humans sat quietly together and kept their thoughts to themselves.

The humans kept saying she might, but then humans were pretty hard to imagine, too.

She did not offer to shake his hand, as most humans might, but instead kept them respectfully behind her back.

If one or more bigger early human was keeping the females to himself, this might change when they start making tools.

Yet humans, refusing to bow down to nature, keep trying to have the last word.

Now he'd find out if the humans kept a list of their guest workers' names.

Any live humans around kept well out of sight.

Why the humans kept her alive and imprisoned, she could only guess.

More than anything, however, the humans had kept her frightened.

"Could I help it that humans kept adding computers and linking them up?"