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C.ItD.That【答案】 A 【解析】【分析】句意:已被證明的是動(dòng)物和昆蟲有自己的語言。根據(jù)is判斷,此處為主語從句,分析該從句,缺少主語,用what。選A?!军c(diǎn)評】考查名詞性從句,本題涉及what引導(dǎo)的主語從句的應(yīng)用。13.They lost their way in the forest, and ________ made matters worse was that night began to fall. A.itB.whichC.thatD.what【答案】 D 【解析】【分析】句意:他們在森林里迷路了,情況更糟糕的是天又黑了。本題中含有一個(gè)主語從句what made matters worse,其中的what引導(dǎo)起這個(gè)主語從句,同時(shí)在主語從句中做主語。故選D?!军c(diǎn)評】考查名詞性從句,本題涉及what引導(dǎo)的主語從句的應(yīng)用。14._____ is known to us all is that China has launched Shenzhou VII spaceship, ____ made the country39。s first spacewalk successful. A.That。 whatB.What。 whichC.It。 whichD.As。 that【答案】 B 【解析】【分析】句意:眾所周知,中國已經(jīng)發(fā)射了神州7號宇宙飛船,這是中國首次成功的太空行走。第一空處為主語從句,從句缺少主語,需用what引導(dǎo);第二空所在句子是個(gè)定語從句,先行詞為整個(gè)主句的內(nèi)容,從句中缺少主語,需用which引導(dǎo)。故選B。 【點(diǎn)評】考查名詞性從句和定語從句,本題涉及主語從句和非限制性定語從句的應(yīng)用。15.Exactly _________ the potato was introduced into Europe is uncertain, but it was probably around 1565. A.whetherB.whenC.whyD.how【答案】 B 【解析】【分析】句意:土豆被引進(jìn)歐洲具體的事件不被確定,但是可能是在1565年左右。根據(jù)時(shí)間狀語round 1565得知這里是指時(shí)間不確定。故選B。 【點(diǎn)評】考查名詞性從句,本題涉及when引導(dǎo)的主語從句。 16._______ has not been decided next. A.How to doB.What to do nextC.To do whatD.To do how【答案】 B 【解析】【分析】句意:接下來做什么還沒有決定。根據(jù)助動(dòng)詞has可知前面是主語,what to do為名詞性從句,可做主語,故選B。 【點(diǎn)評】考查名詞性從句,識記名詞性從句做主語的用法。17.________ his failure lies is expected ________ clear to us. A.What… to makeB.How… madeC.Where… to be madeD.Why… making【答案】C 【解析】【分析】句意:他的失敗之處有可能被我們弄清楚。分析句子可知,主語從句中的lie為不及物動(dòng)詞,所以主句中缺少狀語,因此填where。expect ,“期望某事發(fā)生”,sth. be expected to ”某事有可能發(fā)生“。make sth. clear to sb為固定搭配,意為“向某人闡明某事,使某人弄清某事”。本句中make的賓語是where his failure lies是被弄清楚,要用動(dòng)詞不定式的被動(dòng)形式。因此選C?!军c(diǎn)評】考查名詞性從句及固定搭配,本題涉及主語從句和固定短語expect do.18.________ manners are very important in every country is known to all,but the trouble is that different countries have different ideas about ________ good manners are. A.That。 what16