91.   Because the information is carried by lightwaves, the system will not work if any physical obstruction is placed between the sending and receiving devices.

92.   Because, you see, Ms. Heslin saved Bill Clinton, and allowed the Democrats to say the system works.

93.   Before tackling the job, it is helpful to have a basic knowledge of how the system works.

94.   Because they are free today and not dead, supporters of the death penalty say that they are living proof that the system works.

95.   Both Boeing and Airbus have had to step in when outside suppliers chosen by the airlines failed to make their systems work.

96.   Blank explained how the system worked.

97.   Both systems work much the same way.

98.   Both the Republicans and the Democrats have done just that, which means that so far the system has been working.

99.   ----- However, even if the wake vortex detection system works, it will improve efficiency only marginally.

100.   A clean filter permits the heating system to work easier.