21.   Our advertising campaigns have been too sporadic to have had a lot of success.

22.   The advertising campaign had a negligible effect on demand.

23.   The advertising campaign has been largely unsuccessful.

24.   The advertising campaign proved very profitable.

25.   The advertising campaign was a textbook example of how to sell a product.

26.   The advertising campaign was only partially successful.

27.   The bank launched an advertising campaign to lure back its traditional customers.

28.   The company got into a lot of trouble over its last advertising campaign.

29.   The company has launched an advertising campaign in the hope of attracting new customers.

30.   The company started a big new advertising campaign, and business really improved after that.