16．The Zhoukoudian Beijing Man Site is one of the most important world
Heritage （61）sites（site） in China．Since the discovery （62）was made（make） in the 1920s，Zhoukoudian has become （63）animportant place for archaeologists from all over the world．At the site in the south-west suburb of Beijing，there is the earliest evidence of the use of fire by humans．It has been proved （64）thatpeople lived there continuously between 500，000 and 10，000 years ago．
Today，however，Zhoukoudian is （65）inserious danger．Parts of the cave have been （66）badly（bad） affected by rain and exposure to the air．Some areas are almost completely covered in weeds，（67）causing（cause） serious damage．
Pollution from nearby cement factories has also contributed to the problem．
The site is extremely expensive （68）to maintain（maintain） and （69）itwill cost between three and five million yuan to repair it．At the moment，visitors （70）are（be） not allowed to visit the caves．

分析 周口店北京人遺址是中國最重要的世界遺產(chǎn)之一．但現(xiàn)在洞穴有的部分已經(jīng)嚴(yán)重受到了雨水的影響，有些地方幾乎被雜草完全覆蓋，造成嚴(yán)重損失．因此，需要維護，游客是不允許參觀洞穴．

解答 61．sites 考查名詞復(fù)數(shù)．one of意為"…之一"，后接可數(shù)名詞復(fù)數(shù)形式．
62．was made 考查動詞時態(tài)和語態(tài)．根據(jù)句中時間狀語in the 1920s表示過去時間，且discovery與make是動賓關(guān)系，要用一般過去時的被動語態(tài)．
63．a(chǎn)n 考查冠詞，place意為"地方"，是可數(shù)名詞，單數(shù)形式前要加不定冠詞，因其前有形容詞important，讀音以發(fā)元音開頭，用不定冠詞an．
64．that 考查連詞．根據(jù)句子結(jié)構(gòu)，這是主語從句，it是形式主語，真正的主語是that people lived there continuously between 500，000 and 10，000 years ago從句，that不可省略．
65．in 考查介詞．根據(jù)下文Parts of the cave have been badly affected by rain and exposure to the air可知，洞穴的部分已經(jīng)嚴(yán)重受到了雨水的影響和暴露在空氣中．此處應(yīng)是：周口店受到嚴(yán)重威脅．in danger意為"在危險中"．
66．badly 考查副詞．修飾動詞affect要用副詞．形容詞bad的副詞是badly．
67．causing 考查現(xiàn)在分詞．現(xiàn)在分詞作結(jié)果狀語，相當(dāng)于定語從句，which causes serious damage．
68．to maintain 考查動詞不定式．根據(jù)句意：該遺址的維護是非常昂貴的．用動詞不定式．
69．it 考查代詞．指代前面的"維護遺址一事"．
70．a(chǎn)re 考查主謂一致．根據(jù)句中時間狀語At the moment表示現(xiàn)在情況，主語visitors是復(fù)數(shù)，謂語動詞也應(yīng)用復(fù)數(shù)形式are．

點評 在一篇200詞左右的語篇（短文或?qū)υ挘┲辛舫?0處空白，部分空白的后面給出單詞的基本形式，要求考生根據(jù)上下文填寫空白處所需的內(nèi)容或所提供單詞的正確形式，所填寫詞語不得多于3個單詞．要做好語法填空題，理解短文是解題的前提，扎實的詞匯、句型和語法知識是基礎(chǔ)，英語國家的背景知識是必要的補充．考生須靈活運用語法知識，如單詞詞性、單詞時態(tài)、名詞單復(fù)數(shù)、連接詞、代詞、冠詞等判斷各空白處應(yīng)填寫的內(nèi)容．答完后，還要通讀全文，核對所填單詞形式是否正確，是否符合語境．

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