Instead of oxygen, there was a deadly gas in the tank!

Sucked by the cool air outside, the deadly gas was gradually drawn from the room.

At the expiration of that time a deadly gas will be released inside the Ship.

The lawyer had succumbed to the effects of a deadly gas.

There was nothing which could have retained the deadly gas.

Their command had ended with the advent of the deadly gas.

Within ten minutes, the deadly gas would fulfill its task.

The word shimmered in the air like a cloud of deadly gas.

Now, if the gun falls or is even lowered, it will release a deadly gas.

The terrifying excitement seemed to have entered the room like deadly gas.