2．Over time I have been changed quite a lot．I began （56）as a calculating machine in 1642．It took nearly two hundred years（57）before I was built as an analytical machine．Then in 1936Alan Turing wrote a book and built a universal machine to solve any difficult mathematical problems．From then on，I grew rapidly both in sizes and brainpower．By the 1970s，I （58）had grown （grow）as large as a room and I wonder if I would grow any larger．（59）However，this reality also worried my designers．Luckily，（60）with  time going by，I have been made smaller．And I （61）have been used （use） in offices and homes since the 1970s．
These changes would not be possible without my improved memory，（62）which became so large that I couldn't believe it．In the early1960s，they gave me a family（63）connected（connect） by a network，enabling us to share my knowledge with others．Since the 1970s，many new （64）applications （apply） have been found for me and I have become important in many fields．I am now （65）truly （true） filled with happiness that I am a devoted friend and helper of the human race．

分析 文章以第一人稱的口吻介紹了計(jì)算機(jī)的發(fā)展歷史．計(jì)算機(jī)從一開始出現(xiàn)，到現(xiàn)在的廣泛應(yīng)用，其中經(jīng)歷了巨大的發(fā)展和演變．

解答 56．a(chǎn)s；考查介詞．句意表達(dá)的是1642年我一開始的身份是計(jì)算機(jī)，as以某種身份．          
57．before；考查句型結(jié)構(gòu)．時(shí)間段+before+從句，表示多久以后才…；句意表達(dá)的是花了將近兩百年的時(shí)間我才被改造成分析儀．   
58．had grown；考查時(shí)態(tài)．句中by the 1970s表示到過去某個(gè)時(shí)間為止已經(jīng)完成的動(dòng)作，是過去完成時(shí)態(tài)的用法．    
59．However；考查副詞．句意表達(dá)的是轉(zhuǎn)折，且句中有逗號(hào)分隔，要用表示轉(zhuǎn)折關(guān)系的副詞however來構(gòu)成．         
60．with；考查介詞．句中time后接分詞，說明不能填連詞；句意表達(dá)的是伴隨情況，要用with來構(gòu)成獨(dú)立主格結(jié)構(gòu)，意思是隨著時(shí)間的推移．  
61．have been used；考查時(shí)態(tài)和語態(tài)．句中use與主語I構(gòu)成動(dòng)賓關(guān)系，要用被動(dòng)語態(tài)；時(shí)間狀語since the 1970s表示從過去到現(xiàn)在，是現(xiàn)在完成時(shí)態(tài)的用法，因此use要用現(xiàn)在完成時(shí)態(tài)的被動(dòng)語態(tài)．    
62．which；考查連詞．句中became so large that I couldn't believe it修飾名詞memory，是一個(gè)定語從句；從句缺少主語，且先行詞memory指物，要用which來引導(dǎo)．    
63．connected；考查分詞．句中connect作family的后置定語，要用非謂語動(dòng)詞；connect與family構(gòu)成動(dòng)賓關(guān)系，要用表示被動(dòng)的過去分詞來構(gòu)成．     
64．a(chǎn)pplications；考查名詞．句中apply作主語，要用名詞形式；前面有many修飾，application要用復(fù)數(shù)．    
65．truly；考查副詞．句中true修飾動(dòng)詞filled，要用副詞形式．

點(diǎn)評(píng) 語法填空題是考查學(xué)生的語言運(yùn)用能力．解題時(shí)，要在理解文章的基礎(chǔ)上，靈活運(yùn)用語法知識(shí)，如詞性，時(shí)態(tài)，名詞單復(fù)數(shù)，連接詞，代詞，冠詞等判斷空白處應(yīng)填寫的內(nèi)容．答完后，還要通讀全文，核對(duì)所填單詞形式是否正確，是否符合語境．

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