17．With the（ 61）development（develop） of industry，air pollution is getting more and more serious．In Beijing，many people suffer different kinds of illnesses because （62）ofair pollution．
Air pollution is caused by the following（63）reasons（reason）：about half of the problem is caused by vehicles．There are more and more cars，buses on the roads，and they give off （64）poisonous（poison） gases.25% of air pollution is caused by factories．Another factor is the smokers．Smoking is（65）harmful（harm）to their health．Besides these，about 10%of air pollution is caused by other reasons．
（66）SoWe should do now is take some measures to fight（67）againstpollution．New fuel can be used to take （68）theplace of gas．We can plant more trees．If everybody realizes the（69）importance（important） of environment and does something to stop pollution，the problem will（70）be solved（solve）．

分析 本文主要分析了目前空氣污染所帶來(lái)的危害，造成空氣污染的原因以及對(duì)抗空氣污染所需要采取的措施等．

解答 答案：
61．development   考查固定搭配   with the development of 意為：隨著…發(fā)展；故用development．
62．of     考查句意理解以及介詞    本句的意思是：在北京，由于空氣污染，許多人患上了各種疾�。淮颂幱迷诿~詞組air pollution之前，意為：由于，因?yàn)�；�?yīng)使用復(fù)合介詞because of；故用of．
63．reasons  考查名詞的單復(fù)數(shù)   根據(jù)下文講到了幾種造成空氣污染的原因，可知此處指的應(yīng)是：以下幾種原因；由于reason是可數(shù)名詞，故用reasons．
64．poisonous   考查形容詞   此處用來(lái)修飾名詞gases，意為：各種有毒氣體；故形容詞poisonous．
65．harmful   考查固定搭配    be harmful to意為：對(duì)…有害；吸煙對(duì)身體健康有害；故用harmful．
66． So   考查句意理解以及連詞   本句的意思是：所以我們現(xiàn)在應(yīng)該做的是要采取一些措施與污染作斗爭(zhēng)；故用So．
67．a(chǎn)gainst   考查固定搭配   fight against意為：對(duì)抗；反對(duì)；與…作斗爭(zhēng)；故用against．
68．the   考查固定搭配   take the place of 意為：代替，取代；故用the．
69．importance   考查名詞   此處用在定冠詞the之后，指的是：環(huán)境的重要性；故意名詞importance．
70．be solved   考查語(yǔ)態(tài)    此處用在助動(dòng)詞will之后，與主語(yǔ)the problem 構(gòu)成被動(dòng)關(guān)系，所以應(yīng)使用一般將來(lái)時(shí)態(tài)的被動(dòng)語(yǔ)態(tài)；故用be solved．

點(diǎn)評(píng) 本題主要考查了各種語(yǔ)法在短文中的具體運(yùn)用．做本題時(shí)，需要在正確理解短文的前提下，逐句分析句意以及所考查到的語(yǔ)法現(xiàn)象；因此在平時(shí)的學(xué)習(xí)中，應(yīng)熟練掌握各種語(yǔ)法知識(shí)，其中包括詞法，句法，各種時(shí)態(tài)語(yǔ)態(tài)以及虛擬語(yǔ)氣等．

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