According to the los angles time,a survey of 575 high school students in the united states showed that two-thirds of the students who use their cell phones more than 90 time a day do so because they are unhappy or bored.
According to the los angles time,a survey of 575 high school students in the united states showed that two-thirds of the students who use their cell phones more than 90 time a day do so because they are unhappy or bored.