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.The number of cell phones in use exploded in the late 1980s and part of the 1990s. The number of traffic deaths was reduced in the late 1980s and part of the 1990s due to cell phone use. Cell phone users are likely to be involved in traffic accidents. The use of cell phones has a life-saving effect for pedestrians and drivers.
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are using, have added is used, are adding are being used, have been added being used, were added
It had a life-taking effect because there weren't enough cell phones in use then. The increased use of cell phones then caused a "life-taking effect." Traffic fatalities increased then because the number of cell phones in use decreased. Traffic fatalities decreased then because the number of cell phones in use increased.
The number of cell phones in use exploded in the late 1980s and part of the 1990s. The number of traffic deaths was reduced in the late 1980s and part of the 1990s due to cell phone use. Cell phone users are likely to be involved in traffic accidents. The use of cell phones has a life-saving effect for pedestrians and drivers.
It had a life-taking effect because there weren’t enough cell phones in use then. The increased use of cell phones then caused a "life-taking effect." Traffic fatalities increased then because the number of cell phones in use decreased. Traffic fatalities decreased then because the number of cell phones in use increase
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