21.   Four small biotechnology companies are racing to develop pigs that may serve as organ donors for humans.

22.   Four small biotechnology companies are racing to develop pigs that could serve as organ donors for humans.

23.   He said the company was racing to lock up distribution deals with overseas television and cable companies for its American-made movies and television programs.

24.   In the face of heightened investor interest, companies have raced to raise money.

25.   In the meantime, companies have raced to register bond issues before the fees could be raised back to usual levels.

26.   Just as U.S. companies raced to build movie theaters in Great Britain about five years ago, they are starting to build in South America and some European countries.

27.   Meanwhile, sales of health and performance-enhancement products have surged from the publicity, and companies are racing ahead with new products.

28.   Most software companies are racing to be the first to ship Chicago-compliant applications.

29.   Now the company is racing to catch up but has found that the price of existing towers has become so expensive that it is cheaper to build them.

30.   Now, several companies are racing to put the full texts of hundreds of thousands of copyrighted books, old and new, on the Web.