21.   But booming American mills failed to adopt the technique.

22.   In addition to adopting authentication techniques, companies are forming trade groups and lobbying governments to stiffen penalties against counterfeiters.

23.   The foundation now sells a video that demonstrates the program, and dozens of high school and college teams already are adopting the techniques.

24.   He should not adopt a technique to negotiate about his rights with every jerk on the street.