"Explain why you're sure that these aliens never spoke to each other."

The words seemed slow, as if the alien were speaking at halfspeed.

And if the female alien hadn't spoken to him, in his own language.

McCoy heard the voice inside himself and knew that the aliens had spoken.

He had not missed the fact that both aliens were still speaking Interworld.

Those were the thoughts that had led up to his last remark, and now the small, tedious alien was speaking again.

When the aliens spoke, both the mouth and nose slits moved.

It seemed as if the alien had spoken to her in English, but how could that be?

The Army came and got me out of the university so I could help them understand the language the aliens speak.

It seems like a different alien has been speaking today.