英语单项选择求解

16.______dowegoforpicnics.A.CertainlyB.SometimesC.SeldomD.Once满分：2.5分17.Truehibernationtakesplaceonlyamong______animals.A.whosebloodiswarmB.bloodwormC.warm-bloodedD.theyhavewarmblood满分：2.5分18.______wegavehimanythingtoeat,hewouldsaveitupforhislittlebrother.A.WhenB.ThatC.WheneverD.What满分：2.5分19.I______theoperationunlessitisabsolutelynecessary.A.wouldrathernothaveB.wouldnotratherhadC.ratherwouldnothaveD.rathernotwouldhave满分：2.5分20.Severalday______,Isawthemanagainonthestreet.A.lateB.laterC.latterD.last满分：2.5分21.Nomatterwhatyoumaysay,he______tohisownviews.A.wouldalwaysstickB.willalwaysstickC.shouldalwaysstickD.mustalwaysstickto满分：2.5分22.Graceadvisedustowithdraw______.A.soastogetnotinvolvedB.soasnottogetinvolvedC.sothattogetnotinvolvedD.asnottogetinvolved满分：2.5分23.Chinesemarriedcouple_____redpacketstochildrenandtheunmarriedduringtheChinesenewYear.A.giveB.havebeengivingC.aregivingD.havegiven满分：2.5分24.“Didyoublamehimforhismistakes?”“______”A.I’drathernotdoB.I’dnotratherdoC.I’dbetternotdoD.I’drathernotdoing满分：2.5分25.They_____toourproposal.A.havenotstillrespondedB.havenotrespondedstillC.havestillnotrespondedD.stillhavenotresponded满分：2.5分26.DavidtoldmethatyouwouldtakeatriptoAmerica,______?A.wouldyouB.wouldn’tyouC.didyouD.didn’tyou满分：2.5分27.MrWu______toworkbybuseveryday.A.hasbeentravelingB.hastraveledC.travelsD.istraveling满分：2.5分28.“______yourbest?It’snotsatisfactory.I’mafraidyouwillhavetodoitagain.”A.DoyoutryB.HaveyoutriedC.AreyoutryingD.Haveyoubeentrying满分：2.5分29.Everymeans______triedbutwithoutmuchresult.A.hasbeenB.havebeenC.areD.is满分：2.5分30.Oneoftherequirementsforafireisthatthematerial______toitsburningtemperature.A.beheatedB.isheatedC.wouldbeheatedD.toheat满分：2.5分