21.  What it found is there are a handful of PC makers that sell dependable systems and provide useful service.

22.  Yet the tittle-tattle has performed a useful service, by prompting the royal family itself to open the debate.

23.  Dr Teng had said that during the current economic situation, free entertainment would be a useful service to the public.

24.  Fogel said the journalists were overreacting to what was intended to be a useful service that was not intended to replace free media access.

25.  In the meantime, he said, British troops were performing a useful service in the divided Balkan country.