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- 問題詳情：ManyAmericanshavefoundthecellphonevaluableinprovidinghelpinemergenciesandfreetimeentertainment.(41.)M________，ithasalsobroughtup(42.)p________incarelessdriving,irritatingbehaviorsinpublicandhighexpenses.Cellphonesarealso(43.)________(流行的)in...
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