Unit 4 Astronomythe science of stars.doc

-4-用心爱心专心Unit4AstronomythescienceofstarsⅠ.单项填空1．Whatastrangeman！Heloveshiswifebut________heoftenbeatsher.A．atatimeB．atonetimeC．intimeD．atthesametime答案与解析：D句意为：他这个人很奇怪。他爱他的妻子但同时又经常打她。atthesametime“同时”；atatime“一次”；atonetime“曾经；一度”；intime“及时”。由句意可知D项正确。2．Youmustthinkofaway________intothedangerousareas.A．stoppingpeoplegettingB．tostoppeopletogetC．tokeeppeoplegettingD．topreventpeoplefromgetting答案与解析：D“一种做……的方法”为“awaytodosth./awayofdoingsth.”；“阻止某人干某事”应为“stopsb.(from)doingsth./keepsb.fromdoingsth./preventsb.(from)doingsth.”。3．Theyoungactorslookedsocharmingintheirbeautifulclothesthatwetook________picturesofthem.A．manyofB．massesofC．plentyD．alargeamountof答案与解析：BA、C两项表达错误D项后只可跟不可数名词只有B项后可跟可数名词复数或不可数名词。4．Earthisarockyplanetwherethereisliquidwaterwhichisnecessaryforlifeto________.A．comeB．existC．standD．happen答案与解析：B后半句句意为：水的存在是生命存在的必要条件。existvi.“存在；生存”符合题意。5．Shemade________hertasktotakecareofthesechildren.A．thisB．thatC．oneD．it答案与解析：Dit在此处作形式宾语代替真正的宾语动词不定式。6．Wemust________theactofcheating________afaircompetitionsystem.A．prevent;creatingB．stop;tocreateC．keep;fromcreatingD．stop;creating答案与解析：B根据句意“我们必须阻止这种作弊行为来创造一个公平的竞争体制”可知第二个空格缺少目的状语故选B项。受思维定势影响易把此题看成是prevent/stop/keepsb./sth.fromdoing...句式。7．________Mr.Smithiswellagainhecangoonwithhiswork.A．NowandthenB．NowthatC．TheotherdayD．Nowjust答案与解析：B本句意思为“既然史密斯先生的身体好了他就可以继续工作了”。nowthat“既然”。8．Kateworkedlateintheeveningtofinishherreport________herbosscouldreaditthenextmorning.A．sothatB．becauseC．beforeD．orelse答案：A句意是：凯特工作到深夜写完报道这样她的老板第二天早晨就可以读到它了。sothat用来引导目的状语从句。9．Inamodernsocietyfulloffiercecompetitions________apersondoesisnotalwaysthesameas________hesays.A．what;whatB．what;thatC．that;thatD．that;what答案：A这是一个由what引导的主语从句和宾语从句构成的复合句。what分别在这两个从句中作does和says的宾语。that引导名词性从句只起引导句子的作用在所引导的名词性从句中不作任何成分。10．We'retr