11.   Of course, we could test the concept by making the White House self-sufficient.

12.   Now Delphi has stepped in to join Chrysler in building a running prototype that will test the concept within two years.

13.   Still, Wayne Loney, a third-year dental student who tested the concept, said he thought that students would accept the cost.

14.   The company is now testing the concept in a few stores in Indiana.

15.   The company said it will open at least one Radio Shack superstore this year to test the concept.

16.   The concept is being tested most extensively in California, but it has gained momentum in a few other states so far.

17.   The experiment will test the concept of stabilizing a satellite in orbit without using small jets.

18.   The participants took combination drug therapy for eight weeks and stopped for two weeks to test the concept, known as structured treatment interruption.

19.   The venture is the latest to test the concept of factory-built houses, also known as modular homes, in New York City.

20.   Union Bank of California and others are doing the same and Bank of America is testing the concept in the Sacramento area.