ManyAmericanshavefoundthecellphonevaluableinprovidinghe...
问题详情：ManyAmericanshavefoundthecellphonevaluableinprovidinghelpinemergenciesandfreetimeentertainment.(41.)M________，ithasalsobroughtup(42.)p________incarelessdriving,irritatingbehaviorsinpublicandhig...