1.   A brisk trade in newspapers was kept up almost continually.

2.   Men in shirtsleeves and women in summer dresses were strolling around the airport and ice-cream vendors were doing a brisk trade.

3.   Some retailers have been doing a brisk trade in the new toys, others apparently have not.

4.   The public bar was already doing a brisk trade.

5.   They have, it seems, been doing a brisk trade.

6.   Top Shop is doing a brisk trade in reefer jackets and A-line car coats.

7.   Vendors were doing a brisk trade in souvenirs.

8.   Hotels and stores are doing a brisk trade in vampire kits.

9.   There were three ice cream shops and a chip shop doing brisk trade all the time.