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2.China has the (76)largest population in the world,and about one (77)fifth[fifθ]of the people in the world live in China.Because of the large population,there is(78)lessliving space for (79)each(每个) family.And it's(80)difficult[?difik?lt]for lots of people to find jobs.The large population also (81)causes (引起,导致) many other difficulties for the whole nation.For example,we (82)areshort of energy and water.Most cities are (83)more crowded than before.And the traffic is much(84)heavier['hevi?],the large population  has become a (85)serious (严重的)problem.

分析 中国拥有世界上最多的人口,世界上大约五分之一的人生活在中国.由于人口众多,每个家庭的生活空间就相对较少,很多人找工作也有困难.同时,人口众多对整个国家都造成许多其他方面的困难.例如,中国要提供足够的能源和水来满足人们的日常需求就很吃力;大多数城市比以前更拥挤,交通越繁忙.自然的环境变得越来越糟糕.庞大的人口一直是个严重的问题.

解答 76.largest.最高级考查.结合常识可知中国是世界上人口最多的,结合首字母用最高级largest,故答案是largest.     
77.fifth.序数词考查.结合所给的音标和前面的one可知这里用序数词fifth,one fifth五分之一,故答案是fifth.      
78.less.比较级考查.结合句意因为人口多,人们的生活空间将会更少,space是不可数名词故用比较级less,故答案是less.
79.each.形容词考查.结合所给的提示用形容词each修饰family,故答案是each.           
80.difficult.形容词考查.结合所给的音标提示和句子结构,这里用形容词difficult困难的,it's+adj+for sb+to do sth对某人来说做某事是怎样的,故答案是difficult.
81.causes.动词考查.这里是一般现在时,表示引起用动词cause,主语是三单,故causes.      
82.are.动词考查.这里是一般现在时,be short of 缺乏,主语we复数,故are.       
83.more.比较级考查. than与比较级连用,crowded是多音节单词,比较级是加上more,故答案是more.   
84.heavier.比较级考查.结合句意是说交通更加拥挤的多,结合音标用比较级heavier,故答案是heavier.        
85.serious.形容词考查.problem是名词,前面用形容词,严重的serious,故答案是serious.

点评 读短文,确定语义,判断词形.先易后难  易:固定词组、常见句型或明显的语法结构   难:名词、动词、形容词、副词,注意联系上下文

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