题目内容：
根据以下材料，回答题ItwasAnn'sfirstexperienceofflying.Shehadalwaysbeenafraidofheightsandsowaspreparedtobefrightened.Onlythefactthatshewasgoingtomeethersonwhoshehadnotseenforthreeyearshadgivenherthecouragetomaketheflight.
Shesatinherseat,herhandsgrippingitsarms,herseatbeltalreadyfastened.Theairhostesswastalking,tellingeveryonewhattodoincaseofemergency,showingthemwheretheirlife-jacketswere.Theplanewascrowded,andeveryseatwasfull.Fromherwindowseat,gettingoutinahurrywouldbeimpossible,thoughtAnn.lnanycasewhowouldwanttogetoutofaplaneinmid-air?
Theenginesbegantoshake-thenoiseincreasedtillitwaslikeagreatrushingwind.She
lookedouttoseetherunwayslippastatastonishingspeed.Shewantedtocryout-tostoptheplanebeforeitlefttheground,butsheknewshewastrappedinthisgreatroaringmachine.Imustscream,shetoldherself,andputherhandsoverhereyes.
Therewasastrangefeelingasifsheweregoingupinalift.Thenoisedieddown.Carefullysheopenedhereyes.Throughthewindowshesawagreatcarpetofcloudabove,sobeautifulthatshestaredinwonder,hardlytumingawayfromthewindowtilltheytoucheddown.
Annthoughtshewouldbefrightenedbecause- A．shehadneverflownbefore
B．shehadafearofbeinginhighplaces
C．shehadn'tmadeproperpreparations
D．shewasnaturallytimid
参考答案：
答案解析：