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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.________shecouldn’tseehisface,shecouldtellbyhisvoicethathewasyoung. A.Because B.If C.Though D.Unless 4.—Itisapitythatthediseaseisstillterribleatpresent. —Yes.Itwillbeworse________wetakefurtheractiontodosomethingforit. A.unless B.since C.if D.when 5.Alltheteenagersshouldkeeptakingexerciseeveryday________theyarebusystudyingsomanysubjects. A.until B.because C.unless D.though 6.You’ll________thewar________youwatchthefilm. A.feelsadabout;unless B.feelsadabout;if C.feelsadwith;unless D.feelsadwith;if 7.—Whenwilltherailwaythatconnectsthetwocitiesopen? —nextyear.Onlytwothirdsbeenbuilt. A.Until;has B.Until;have C.Notuntil;has D.Notuntil;have 8.Therewillbefeweraccidents_______allofusobeythetrafficrule. A.if B.unless C.though D.because 9.—ThenovelwrittenbyStephenseemsabitboringtome. —___________youputyourheartintoit,youwon'tenjoyit. A.When B.If C.After D.Unless 10.Inancienttimes,peopleseldomtravelledlongdistancesandmostfarmersonlytravelled________thelocalmarket. A.longerthan B.morethan C.asmuchas D.asfaras 11.Allstudentsshouldkeeptakingexerciseeveryday_______theyarebusystudyingsomanysubjects. A.until B.because C.though D.unless 12.Samthoughthisrobotbroken________Jimpointedoutthathe’dforgottentoturnitoff. A.until B.unless C.after D.assoonas 13.—WhatdoyouthinkofMr.Green,Tim? —Heissoboring.Hedoesn'thaveanyhobbies________youcallwatchingTVahobby. A.if B.unless C.since D.though 14.Theastronautlivesin________thathehastobecarefulwitheverymovement. A.suchlittlespace B.solittlespace C.somuchspace D.suchmorespace 15.Thekitcheninmyflatiswelldesigneditisabitsmall. A.although B.since C.so D.because 16.—DidyouwatchtheNewsNetworkShowyesterday? —Yes,ofcourse.Inevermissit________Ihavetoomuchhomework. A.unless B.until C.if D.since 17._______Chinahascontrolledthevirus,somepeopleinotherpartsoftheworldstilllive