91.   Willis never found the light switch inside the vault.

92.   Wires extend up from the mines through two batteries and then to something like a light switch.

93.   Yet more than half a billion people rely on it as they do a light switch.

94.   A report by the National Research Council likened the climatic effect of global warming to increasing pressure from a finger flipping on a light switch.

95.   And when they need a place to spend the night, our two young heroes merely sneak into a studio building, flip a light switch, and BOOM!

96.   As president, he would carry a screwdriver around in case he had to fix a light switch or kitchen appliance.

97.   Flip off those light switches.

98.   Hanifi flicks the light switch on and off.

99.   I rushed in and fumbled for a light switch.

100.   In fact, she said, the company has taped over light switches in offices and installed motion sensors that turn lights off when rooms are empty.