Unit2单选21.Hesayshewon'tbefreeuntiltomorrow.A.thatB.ifC.whetherD.what22.IneverdoubtIamenoughclever.A.thatB.whetherC.whatD.if23.DaddyandMummy,youarebackfromthesupermarket.Canyoutellme?A.howyougothereB.howmanypiecesofbreadyoubuyC.howmuchmilkdidyoubuyD.ifyouboughtmyfavouriteicecream24.---Howlongdoesittaketogettotheairport?---Fortyminutes.Butit'sfoggytoday.I'mnotsuretheexpresswaywillclosesoon.Let'ssetoffearlier.A.whetherB.whenC.howD.why25.---smartboyheis!---Soheis.A.HowB.WhatC.WhataD.Howa26.wonderfulconcerttheyareputtingoninthecitysquare!A.HowB.WhatC.WhataD.Whatan27.---interestingthestorybookis!---Yes.Ihavereadittwice.A.WhataB.WhatC.HowaD.How28.---interestingthestorybookis!---Yes.Ihavereadittwice.A.WhatB.WhatanC.HowD.Howan29.Thebighendownandbegantoeggs.A.lay;layB.lay;laidC.lied;layD.lay;lie30.Sheissimilarhermother.A.toB.withC.ofD.in31.WeneverdoubtBillishonest.Becausehenevertelllies.A.thatB.ifC.whetherD.thatif32.Ithinkthemanisright.A.whenB.ifC.whetherD.that33.I'vedecidedtogotoLondonnextweekend.Iwaswonderingyoucouldgowithme.A.ifB.whenC.thatD.where34.Theywonderrobotswillmakehumanslosetheirjobsornot.A.thatB.ifC.whether35.honestmanheis!A.WhatB.WhatanC.HowD.Howan