专题12定语从句——高效演练一.单句语法填空Manyyoungpeople，mostof_werewell－educated，headedforremoteregionstochasetheirdreams.【答案】whom【解析】考查定语从句的用法。句意：很多年轻人前往偏远地区去追逐他们的梦想，他们中的很多人都受过良好教育。根据句子结构可知，此处为定语从句，先行词为Manyyoungpeople，作介词of的宾语，故要用whom。Wewillputoffthepicnicintheparkuntilnextweek，_theweathermaybebetter.【答案】when【解析】句意：我们将把公园的野餐推迟到下个星期，那时天气可能会更好。考查定语从句。先行词是nextweek，定语从句中不缺少主宾表，缺少时间状语，所以用when3．(天津高考改编)Oneday，mentallyexhausted，Iwrotedownallthereasonsthisproblemcouldnotbesolved.【答案】why【解析】句意：一天，精疲力竭，我写下这个问题不能解决的所有原因。考查定语从句。从句缺少原因状语，用why引导。4．(浙江高考改编)Scientistshaveadvancedmanytheoriesaboutwhyhumanbeingscrytears，noneofhasbeenproved.【答案】which【解析】句意：关于人类为什么哭的时候会流泪，科学家已经提出了很多理论，没有一个得到了证明。考查定语从句，先行词是theories，指物，定语从句中用“代词＋介词＋关系代词which”引导。5．Imadefriendswiththenatives，andtheirreactionamazedme.Theygavemepresentsoftheirfavoriteartworks_theyhadrefusedtoselltotourists.【答案】which【解析】句意：我和当地人交朋友，他sell后缺少宾语，用关系代词which。6．Oneimportantbiologicalfactor_helpswomenlivelongeristhedifferenceinhormonesbetweenmenandwomen.【答案】that/which【解析】factor后带有定语从句，关系代词作主语，用that/which。7.Ilivenextdoortoacouple_childrenoftenmakealotofnoise.【答案】whose【解析】句中指的是那对夫妻的孩子，用whose引导定语从句。8．SocondorswithhighlevelsofleadaresenttoLosAngelesZoo，_theyaretreatedwithcalciumEDTA，achemicalthatremovesleadfromthebloodoverseveraldays.【答案】where【解析】先行词为地点，从句用where引导作状语。9.Anurse_understandsthehealing(治愈)valueofsilencecanusethisunderstandingtoassistinthecareofpatientsfromtheirownandfromothercultures.【答案】who【解析】先行词为人，用who在从句中作主语，引导定语从句。10．IhadonetriplastyearIwascaughtbyahurricaneinAmerica.【答案】where【解析】此处lastyear为干扰性内容，从句表达得是我在路途中被困，故先行词为trip,用where=inwhich引导定语从句。11．Thenumberofsmokers,_isreported,hasdroppedby17percentinjustoneyear.【答案】as【解析】句意：据报道，吸烟者的数量在一年内下降了17%。as引导的定语从句，在这里作主语，意为“正如……，这一点”，代替整个主句的内容。12．Itisatrulydelightfulplace,looksthesameasitmusthavedone100yearsagowithitswindingstreetsandprettycottages.【答案】which【解析】句意：which代替先行词place，在定语从句中用作主语，引导非限制性定语从句。不可用that。13．OppositeisSt.Paul’sChurch,