11.  The big unknowns are how often the virus will become resistant to these drugs and whether they will turn out to have hidden dangers after longer use.

12.  The Serbs are also concerned that they would also be more exposed to a NATO attack if they could no longer use U.N. peacekeepers as a shield.

13.  Use longer strips near center of pie and shorter onces near edges.

14.  While his early work incorporated political activism, he no longer uses Chicano political and social causes as the basis for his work.

15.  With the market now in a slump, the insurers can no longer use stock market gains to subsidize low rates.

16.  Already, researchers have shown that brief treatment with the drug AZT cuts this hazard in half, while longer use coupled with Caesarean delivery virtually eliminates the risk.

17.  As a result of the outbreak, the Waukesha School District announced it will no longer use food bars in school cafeterias.

18.  Longer use of AIDS drugs typically turns up more problems.

19.  Longer use seems to be reducing hospitalizations.

20.  This season, however, the NHL has decided it will no longer use videotape replays to decide disputed goals when a player is in the crease.