"We're about to drill a test hole to the surface, so anyone who's not involved should take a rest break."

Hell, we'd already drilled a test hole there and come up empty.

But they had drilled a test hole on the island where his body had been found.

In addition you often find test holes, because, before starting their work, the people wanted to know if the bark or the wood were all right.

If they get good results, the exploration process can expand to hundreds of test holes, as the company plan says.

He said forcefully, "What do you mean - running a test hole?"

We drove nearly to the top before stopping because I wanted to sink a test hole just below the dam.

So they had to dig test holes at $500,000 per hole.

But instruments in a separate 7,000-foot-deep test hole that had been drilled earlier recorded data.

Satisfied, Foremole moved towards the test hole with the rest of his team.