4.Ihelpedher______whenStella becameill.5.Thecoverprotectsthemachine______ dust.6.Thisprojectis___urgentneedof funding.7.Thisisanewapproach___teaching languages.outfrominto1.Theairqualityinthecity,_____isshown inthereport,hasimprovedoverthepasttwo months.A.that B.it C.as D.what解析：本题考查定语从句。由题干可知，设空处缺少非限制性定语从句的关系词，则选项C符合题意。it和what不能引导定语从句，that不用于非限制性定语从句。句意：正如报告中所表明的，城市空气质量在过去两个月里已经得到改善。5.Thelittleboywasshockedbytheviolent sceneshehad______.A.pausedB.yelledC.witnessedD.fled解析：本题考查动词词义辨析：pause暂停，中止；yell呼喊；witness目击；flee逃跑；依据句意理解，则选项C符合题意。句意：这个小男孩被他亲眼目睹的暴力场面惊呆了。6.Ihavebeenconvincedthattheprint mediaareusuallymore_______andmore reliablethantelevision.A.accurate B.ridiculous C.urgent D.shallow解析：本题考查形容词辨析：accurate精确的；ridiculous可笑的，滑稽的；urgent紧急的；shallow浅的，肤浅的；句意：我确信印刷媒体常常会比电视更准确、更可靠。8.Canyoutellme____ifyou’recoming?A.atthesametimeB.aheadoftimeC.inthemeantimeD.ontime解析：本题考查短语辨析：atthesametime同时；aheadoftime=inadvance提前；inthemeantime与此同时；ontime按时；依据句意理解，则选项B符合题意。句意：如果你要来，能不能提前告诉我？What’sthemeaningofthepicture?Thefather______thelittleboytogoatonce.urgedWhat’sthechilddoing?Thechildis_________awaybythegrandmother.draggedWherearetheirmothers?Manylittlechildrenare__________bytheirparentsbecauseofcongenital(先天的)heartdisease.abandonedWhat’sup?He____________deathatthesightofthesharks.wasterrifiedtoPleasefindouttheseexpressions.annualmigrationhugewhalessortoutintimeanenormousanimalcrashdownaheadofraceafter年度迁徙大鲸鱼整理及时大型的动物朝下猛撞在……之前追赶；在...后面跑Pleasefindouttheseexpressions.headoutapackofaimAatBinthemeantimefiercehuntermanoverboardapproach离去；出发；启程一群；一包