21.   The drilling boom continues amid unchanged global oil prices and U.S. natural gas prices that continue to lag behind a year ago.

22.   The employment boom has continued with little, if any, upward pressure on wages.

23.   The exercise boom continues.

24.   The real boom here continues to be in construction.

25.   Theater chains believe the boom will continue.

26.   Troy, nevertheless, believes unions will fail to reverse their shrinking presence in corporate America even if the boom continues.

27.   Until now, there has been a prevailing consensus, fueled by the innate optimism of the current generation of Americans, that the boom could only continue.

28.   Will the boom continue?

29.   Yet the microelectronics boom continues, as engineers squeeze more and more transistors onto tinier and tinier chips.

30.   A construction boom continues.