41.   It was the sort of piece news directors keep around in the hope they will not be desperate enough to have to use it before the millennium.

42.   Later, controllers went to the old communications system used before VSCS, Jensen said.

43.   Marines taught Air Force and Navy personnel how to load packs they had never had to use before.

44.   Ms. Edzard, the director, said that the Imax technology, which she had never used before, presented its own challenges as well as its own rewards.

45.   None of the three has used them before.

46.   Pennrose hoped to refurbish the monastery with the use of historic-preservation tax credits, a device it had used before.

47.   People have used me before because of my height.

48.   Potential buyers should try to figure out exactly how they will use them before committing to a size or weight.

49.   Recent Taliban statements reflect a bin Ladin-style outrage, defiance and pan-Islamism that the Taliban had never used before his arrival.

50.   Researchers also said that the tools they had used before in searching for genes involved in complex mental disorders were too crude for the task.