[单选]  二、阅读理解：阅读下面的短文，根据文章内容从A、B、C、D三个选项中选出一个最佳选项。      Whiletherearestillmanypeoplewhodon'tfeelcomfortableusingacreditcardtobuyovertheInternet,e-commerceisabsolutelyheretostay.IfyoutakeafewprecautionsbuyingovertheInternetcanactuallybesaferthanusingyourcreditcardinarestaurant.     Justasyoushouldnoticeyoursurroundingsandsuspicious-lookingpeoplewhenwithdrawing(提取)moneyfromanATM,youshouldknowhowtorecognizethewarningsignsofInternettricksandtakestepstoavoidbeingavictimwhenshoppingonline.Herearesomegoodtipstorememberwhenshoppingonline:      Beforesubmittingyourpersonalinformationtoasite,trytofindouthowtheinformationmaybeusedandwhetheritwillbesoldtoorsharedwithotherbusinesses.Ifyoudon'tlikewhatyouread,shopsomewhereelse.      Don'tprovidepersonalinformationsuchasaddress,telephonenumber,socialsecuritynumber,ore-mailaddressunlessyouknowwhoyouareprovidingtheinformationfor,whyit'sbeingrequested,andhowitwillbeused.      Useacreditcard,notadebitcard(借记卡)forshoppingontheinternet.Debitcardsdon'thavethesameprotectionascreditcards.      Carefullyreviewyourcreditcardandbankstatementeachmonthforunknownchargesandinformyourcreditcardcompanyorbankimmediatelyifyounoticeanychargesyoudidn'tknowabout.      Cleanyourcomputerwithfreeonlinesoftwarethatdetectsspy-wareandinstallafirewall(防火墙)toensurethesitesyoushopondon'tinstallspy-wareonyourcomputer.1.Whileshoppingonline,youshould A.besurenobodyisstandingbesideyouB.onlyshopatthesitethatyouhaveoftenvisitedC.findouthowthepersonalinformationwillbeusedD.neverprovidepersonalinformation2.Accordingtothepassage,ifyoufindyourcreditcardhasunexplainedcharges,youshouldA.tellyourcreditcardcompanyassoonaspossibleB.changeyourcreditcardcodenumberimmediatelyC.checkallthewebsitesyouhavevisitedD.useadebitcardinsteadofacreditcard3.Theunderlinedword“precaution“inParagraphOnemeanssomethingdoneto .A.makesuspicious—lookingpeoplegoawayB.protectyouagainstlossorpossibledangersC.remindyoutoobeytheruleswhensoppingonlineD.avoidbeingcheatedwheneatinginarestaurant4.Whatisnotadvisedbythewriterwhenshoppingonline?A.Usingcreditcards.B.Installingafirewall.C.Visitingfamouswebsites.D.Beingverycareful.5.What'sthewriter'spurposeinwritingthispassage?A.Tosuggestanewwayofshopping.B.Totellustheadvantagesofshoppingonline.C.Totellushowtoshopsafelyonline.D.Totellushowtoavoidbeingcheated.