4．In our life，the fear of heights always（61）exists（exist） and it is a common feeling that is easy（62）to understand（understand）．It is one of only two natural fears and（63）theother is the fear of loud noises．Actually，having a fear of heights is good because it protects us（64）from/against real danger．
    However，some people have an unreasonable and unhealthy fear of heights．They experience strong fears even inside a safe environment such as a tall building，（65）whichis not a common response and it is not helpful．（66）Fortunately（fortunate），this can（67）be treated（treat）．There are many ways as follows．
    The most efficient way seems to make the people know（68）their（they） fear，for example，by encouraging them to go to the top of tall buildings．
Another way to overcome the fear is to learn to control the physical symptoms．When （69）faced（face） with a th reatening situation，one can take slow，deep breaths．If possible，a few minutes of deep thinking may be（70）effective（effect） in reducing tension．In a word，the fear of heights can be dealt with．

分析 本文告訴我們恐高癥是一個很正常的現(xiàn)象，在一定程度上它可以保護(hù)我們遠(yuǎn)離危險，但是在一定的安全環(huán)境下恐高就需要治療，文章提到了兩者治療方式：一是要患者認(rèn)清自己的恐懼，鼓勵他們?nèi)ジ咭稽c的建筑上去；二是教他們通過深呼吸等方式去控制恐懼感．

解答 61．exists；考查動詞的時態(tài)，本文陳述一個事實，要用一般現(xiàn)在時態(tài)，主語 the fear 為抽象名詞，故動詞用第三人稱單數(shù)exists．  
62．to understand；考查動詞不定式，此處不定式作主語，即to understand is easy．
63．the；考查冠詞，這里用the放在other前面，與上文的one構(gòu)成"one…the other…"結(jié)構(gòu)．  
64．from/against；考查介詞，protects sb  from/against 是固定搭配，意為"保護(hù)某人使不受…的侵害"．
65．which；考查定語從句，分析句子結(jié)構(gòu)知這是一個非限制性定語從句，用which指代上文提到的內(nèi)容．  
66．Fortunately；考查副詞，此處用副詞作句子的狀語．    
67，be treated；考查動詞的語態(tài)，此處主語this指代上文提到的 the fear of heights，與動詞treat是被動關(guān)系，"恐高癥是可以被治療的"，故用被動語態(tài) be treated．   
68．their；考查物主代詞，這里用形容詞性物主代詞放在名詞fear前面作定語．     
69．faced；考查省略句，原句應(yīng)為when they are faced with a threatening situation…．
70 effective；考查形容詞，系動詞be后面跟形容詞形式作表語，構(gòu)成系表結(jié)構(gòu)．

點評 語法填空題是考查學(xué)生對語篇的理解能力和語言知識的應(yīng)用能力．解題時，要在理解文章的基礎(chǔ)上，充分考慮語境和上下文的聯(lián)系．運用所掌握的詞匯，語法等知識進(jìn)行作答．

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