题目内容
10.The truth(41)thattrees are vital to our life is not a secret.They provide us with food,wood and most (42)importantly(important),oxygen.Now there is one more thing we can add to this list-blocking out harmful bacteria from water.The discovery(43)was made(make) by a team (44)consisting(consist) of scientists from the Massachusetts Institute of Technology (MIT) and high school students(45)who were seeking a natural water filter-one that would help communities in developing countries that do not have (46)acess(accessible) to modern water filter systems.
The(47)researchers(research),led by Professor Rohit Karnik,decided to turn to trees for help because they could allow liquid to flow through,while blocking out air bubbles.
They began by cutting 1.5-inch-wide sections of tree bark from the branches of a white pine tree.The people related then tested the wood's filtering ability by pouring water containing red dye particles of different sizes through.(48)Totheir amazement,they found that it was effective in trapping all the articles.(49)Encouraged(encourage),the team conducted(50)anotherexperiment,this time with water that contained bacteria.Sure enough,the sapwood held back 99% of the bacteria,allowing only 1% to flow through.
分析 本文主要介绍了一个新发现.树在我们生活中起着很重要的作用,科学家又发现了树的一种新的功能--防止细菌污染水.
解答 41.that 考查同位语从句.同位语从句,说明truth的内容,又因为从句中不缺少成分,且意思完整,故选用从属连词 that.故填that
42.importantly 考查副词.句意:他们为我们提供了食物和木头,更重要的是提供了氧气.此处 most importantly 是在修饰谓语动词 provide,故用副词.故填importantly.
43.was made 考查被动语态.此处指上文中的新发现是由一个被几个科学家组成的队伍做出的,the discover 和make 之间是被动.the discovery是单数,而且文章使用一般过去时.故填was made.
44.consisting 考查分词做定语.句中修饰team,consist of是固定短语,由…组成,不可以用被动态,所以用现在分词做定语,修饰team..
45.who 考查定语从句. 句中含有定语从句,先行词是students,从句中缺少主语,所以用who.
46.acess.考查固定短语. have access to 是固定短语,意思是:可以接近,可以使用.所以用access.
47.researchers 考查主语.分析该句结构可知,谓语动词为decided,那么能发出这个动作的主语应该为researchers研究人员,研究者.故填researchers.
48.To 考查固定结构.to one's amazement是固定结构,表示"令某人惊讶的是".故填To.
49.Encouraged 考查分词做状语.此处为分词做状语,主语team与encourage之间是动宾关系,故选用过去分词.故填Encouraged
50.another 考查代词.根据上文可知关于此事做过实验,这次是除了上次以外的另一个实验,故用another另一个.故填another.
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