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一、选择题 1.Maxgotlostandwastrappedintheforestfor10hours_______afarmernearbyfoundhim. A.if B.since C.until D.after 2.Dr.Smithwillneverleavehisparents________heissurebothofthemaretakengoodcareof. A.since B.though C.if D.unless 3.MygrandmaenjoyssharingvideosonDouyinliketheyoung________sheisoverseventy. A.since B.if C.though D.unless 4.Samthoughthisrobotbroken________Jimpointedoutthathe’dforgottentoturnitoff. A.until B.unless C.after D.assoonas 5.________thatmoment,Ineverrealizedhowmuchmyfatherlovedme. A.At B.Unless C.Until D.Since 6.—DoyouliketheChinesecartoonBoonieBears:BlastintothePast? —Sure.Itis________interestingfilm________mysonwantstoseeitagain. A.so;that B.sucha;that C.soan;that D.suchan;that 7.________shecouldn’tseehisface,shecouldtellbyhisvoicethathewasyoung. A.Because B.If C.Though D.Unless 8.—Itisapitythatthediseaseisstillterribleatpresent. —Yes.Itwillbeworse________wetakefurtheractiontodosomethingforit. A.unless B.since C.if D.when 9.Alltheteenagersshouldkeeptakingexerciseeveryday________theyarebusystudyingsomanysubjects. A.until B.because C.unless D.though 10.Smilingisthebestpolicy.Peoplewillsmileback________yousmileatthem. A.unless B.although C.until D.when 11.Inancienttimes,peopleseldomtravelledlongdistancesandmostfarmersonlytravelled________thelocalmarket. A.longerthan B.morethan C.asmuchas D.asfaras 12.Youwillbeoutofdate________youkeeponstudyingfromtimetotime. A.unless B.although C.if D.otherwise 13.Millie’sresearchpaperisn’tuptostandard_________shehasworkedatitfortwoweeks. A.since B.unless C.if D.although 14.—Hasthemeetingbegun? —Notyet.Wehavetowait________everyoneishere. A.and B.until C.or D.but 15.We’renotveryclosefriends________we’veknowneachotherforalongtime. A.until B.although C.as D.if 16.IthinkthecoffeebeansarefromBrazil,________I’mnotcompletelysure. A.because B.since C.though D.whether 17.—DidyouwatchtheNewsNetworkShowyesterday? —Yes,ofcourse.Inevermissit________Ihavetoomuchhomework. A.unless B.until C.if D.since 18.—_______Dr.ZhongNanshanknew