Suddenly, the smoke grew blacker, and his eyes sharpened a little.

The smoke was growing thicker down in the village now.

Then the smoke grew too thick for him to see more, and there was nothing to do but wait.

Until the smoke grew too dense I kept my eyes on the couch, but there was no change.

But then the smoke grew heavy inside the offices too.

When the smoke grew so thick Fox could barely see two feet in front of her, she knew it was time to leave.

The smoke was growing thicker, and taking on a shape.

More fell and the smoke near the entrance grew thicker.

The smoke from the candles grew dense before the statues.

The smoke had grown so thick that Seven could barely see.