But when a rare opening appears, the competition includes many workers with more experience.

The ranger looked back to the door to see a small opening appear right above it.

An opening appeared in the wall, and they were racing for it.

Following the transmission, an opening appears in the side of the mountain.

Immediately, an opening appeared in the wall where none had been before.

An opening appeared in the wall ahead and they shot into it.

After two minutes, a square opening appeared under the flame.

He was starting around it when a black opening suddenly appeared and men began to push their way out.

Then, very deliberately, a narrow opening appeared to one side.

The opening was still there and appeared, if anything, to be widening a bit.