must-mustnt-needent-练习

MUST:Itisnecessarytodosomething.Imustputtherubbishout.Itsmellsawful.MUSTN’T:Itisforbiddentodosomethingoritisthewrongthingtodo.Youmustn’tfeedtheanimalatthezoo.NEEDN’T:Itisnotnecessarytodoit,youdon’tneedtodoit.Youneedn’tbuyanewpencil.Iwillgiveyouone.FILLINTHEBLANKSWITH“MUST”or“MUSTN’T”1.You……………crossthestreewhenthetrafficlightsarered.2.We…………leaverightnow.Wearegoingtobelateforschool.3.Susanhasgotaveryimportantexamtomorrow.She…………watchTV.4.Thestudents…………..runinthecorridors.Theymightfall.5.You………….gooutwithoutyourcoat.Itisfreezingoutside.6.We…………..protecttheanimalsandenvironment.7.Ifyouwanttogotouniversity,you…………….studyregularly.8.We…………..obeythetrafficrules.Itisveryimportantforoursafety.9.People…………..cutdowntreesiftheydon’twanttoincreaseglobalwarming.10.Students…………cheatintheexam.Itisnothingbuttheft.11.People…………bepolitetoeachotherandshouldn’thurteachother’sfeelings.12.You…………..buythosetomatoes.Theyarerotten.13.We………….buysomeflourandafeweggs.Wewillmakeacakebutwehaven’tgotanyflourandeggs.14.You……………parkhere.Itisforbiddentoparkhere.FILLINTHEBLANKSWITH“MUSTN’T”or“NEEDN’T”1.You…………….buyanymorebread.Wehavegotplenty.2.IhavestudiedfortheexamformorethansixhoursandIunderstoodeverydetail.I………….studymore.3.Jackhasjustpaintedthebench.You…………..sitonit.4.We…………speakloudlyinthelibrary.Otherpeoplemightbedisturbed.5.You………….bringanyfoodfortheparty.Wehavegotenoughfood.6.You………….eatordrinkintheclassroom.Theteachermightbeangry.7.We……………buyanyCDs.Wehaven’tgotaCDplayer.8.George……………eatfastfood.Heisveryfatandfastfoodisunhealthy.9.Thestudents………….bringtheirbookstodaybecausetheyaregoingtovisitthemuseum.10.People……………throwlitteronthefloor.11.We…………..shoutateachotherwhenwearediscussingsomething.Itisveryrude.12.Jack……………buyanothercarbecausehehasgotthreealready.13.You………….gonearthatdog.Itmightbiteyou.14.We……………buythatbook.Peterhasgotthesamebook,sohecanlendittous.FILLINTHEBLANKSWITH“MUST”“MUSTN’T”or“NEEDN’T”1.People………………savethetunafish,otherwisetheywillbeextinctinthefuture.2.We…………………killtheseals.We…………….protectthem.Theyareverylovelyanimalsandtheyhavearighttoliveaswedo.3.You……………putthepizzaintherefridgerator.Itisalreadygoneoff.Justputitinthebin.4.Thestudents…………….becarefulreadingthequestions.Mostofthewronganswersareduetomisunderstandings.5.You………….buyanyticketsforthematch.IhavegottwoandIwillgiveoneofthemtoyou.