Every officer could expect to be tested once every six years.

The compound was once tested as a fuel component in a model rocket.

He had once tested the well and found it contaminated.

The problem is most of my patients want to know why they shouldn't be tested once every six months.

The groups were tested once after training and then again eight hours later.

Herds should be tested once or twice a year to maintain the health and keep out the disease.

And he had another power of his own, already tested once.

Young, sexually active women should be tested once a year at least but you may need to ask.

Body fat and urine are tested once during the preseason.

The missile has been tested once, and failed 35-40 seconds after launch.