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一、选择题 1.We’renotveryclosefriends________we’veknowneachotherforalongtime. A.until B.although C.as D.if 2.Don'tbeafraidofaskingforhelp________itisneeded. A.unless B.until C.although D.when 3.________sheiswrong,it’snotabigdeal. A.Because B.So C.Although D.But 4.—Hasthemeetingbegun? —Notyet.Wehavetowait________everyoneishere. A.and B.until C.or D.but 5.—MyparentsgaveredpacketstomysistereverySpringFestival________shegotajob. —That’sbecauseyoursisterwasabletomakemoneybythattime. A.after B.when C.since D.until 6.Samthoughthisrobotbroken________Jimpointedoutthathe’dforgottentoturnitoff. A.until B.unless C.after D.assoonas 7.You’ll________thewar________youwatchthefilm. A.feelsadabout;unless B.feelsadabout;if C.feelsadwith;unless D.feelsadwith;if 8.—Whenwilltherailwaythatconnectsthetwocitiesopen? —nextyear.Onlytwothirdsbeenbuilt. A.Until;has B.Until;have C.Notuntil;has D.Notuntil;have 9.Smilingisthebestpolicy.Peoplewillsmileback________yousmileatthem. A.unless B.although C.until D.when 10.Manypeopledonotrealizetheimportanceofhealth_________theyhavefallenill. A.until B.while C.when D.after 11.Allstudentsshouldkeeptakingexerciseeveryday_______theyarebusystudyingsomanysubjects. A.until B.because C.though D.unless 12.Thetheatrewillhavetoclose________thegovernmentagreestogiveextramoney. A.if B.unless C.because D.until 13.—WhatdoyouthinkofMr.Green,Tim? —Heissoboring.Hedoesn'thaveanyhobbies________youcallwatchingTVahobby. A.if B.unless C.since D.though 14.Mr.Pickywon’twanttoeatit________he’sreallyhungry,inwhichcasehe’lleatalmostanything. A.because B.when C.before D.unless 15.Thekitcheninmyflatiswelldesigneditisabitsmall. A.although B.since C.so D.because 16.—_______Dr.ZhongNanshanknewthatCOVID-19wasadeadlynewvirus,hestillwenttoWuhaninCentralChinatohelpthelocalpeople. —Heisreallyabraveandkinddoctor. A.If B.Assoonas C.Because D.Although 17._______Chinahascontrolledthevirus,somepeopleinotherpartsoftheworldstillliveinfearoftheirlives. A.While B.Although C.Unless D.Until 18.It’salmostt