题目内容：
根据以下材料，回答题"IsometimesgetupatthreeorfourinthemorningandIsurfthenet."
"Ioftencheckmye-mailfortytimesaday."
"Ioftenspendmorethanthreehoursduringonetimeonthenet."
"Ispendmoretimeinchatrooms(聊天室)thanwithmy'real-life'friends."
Doyouknowanypeoplelikethese?Theyarepartofanewaddiction(瘾)calledInternetaddiction.Internetaddictsspendatleastthirtytofortyhoursonlineeveryweek.TheuseoftheInternet
canbeanaddictionlike
drug(毒品)use.Peoplelosecontrol(控制)ofthetimetheyspend
ontheInternet.
Forexample,onecollegestudentwasmissingforseveraldays.Hisfriendswereworried,andtheycalledthepolice.Thepolicefoundthestudentinthecomputerlab:hewassurfingthenetfor
severaldaysstraight.
Studiesshowthatabout6to10%ofInternetusersbecomeaddicted.AndpeopleworryabouttheteensbecausetheInternetischangingtheplayingfieldforsomeofthem.Theyspendmoretime
incyberspacethanintherealworldoffriendsandfamily.
Is"surfingthenet"ahobbyoranaddictionforyou?Youmayhaveaproblemifyouhavethesesymptoms(症状):
YoudonotgotoimportantfamilyactivitiesoryoudonotdoschoolworkbecauseyouliketospendhoursontheInternet.
Youcan'twaitforyournextonlinetime.
Youplantospendashorttimeonline,butthenyouspendseveralhours.
Yougooutwithyourfriendslessandless.
Whatdoesthebeginningofthepassagetellus? A．HowtobecomeanInternetaddict.
B．WhatanInternetaddictusuallydoes.
C．WheretofindanInternetaddict.
D．Whytowritethispassage.
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