回答64~67题：AvolcanlcctuptioninicelandhassentashzcrossnorthernEurope.AirlineshaveStoppedorchangedtheflightsacrosstheAllanticOcean,leavinghundredeofpassengetsstuckinaipports.
GrimsvotnisoneofthelargestandmostactivevolcadoesinEurope.WhatmakesGrimsvomdifferentisthatitliesunderahugeglacier(冰川)oficeupto12matersthick.Thehotvolcanoheatsuptheiceaboveit,whichthenformsalayer(层)ofwaterbetweentheglacierandthevolcanoThislayerofwaterputspressureonthevolcano,keepingitstable ,Asthewaterflowsoutfromundertheglacier,thepressurelifts.Thelava(岩浆)fromthevolcamthencomesuptothesurface.Thisisexactlywhathappenedtoday.
Now,airlineshavetomakechangestotheirflightssoasnottoflythroughthecloudsofvolcanicash.AccordingtoKLM.oneofEurope’sbiggestairlines,airplanescannotgounderthecloudoroverit.Goingthroughthecloudcanresultinashgettingstuckintheairplane’sengines,causingdamagetotheplane.
TheeruptionhasalsocausedproblemsforanimalsinIceland.Thevoicaneleftashandsharp.Glass-likerocksalloverthecountr yside.Farmersarekeepingtheiranimnlsinsidetostopthemfromeatingash-coveredgrasstothesharpobject.
第9题：WhatmakesGrimsvotndifferentfromothervolcanoes?
A．Itisbelowice.
B．Itliesunderthesea
C．Itisthelargestvolcano
D．Itislavaaffectstheairlines
正确答案：A
