Question

【题目】语法填空(每小题1分，共10分)

阅读下面材料，在空白处填入1个适当的单词或括号内单词的正确形式。

The truth___1___trees are vital to our life is not a secret. They provide us with food，wood and most ___2___(important)，oxygen. Now there is one more thing we can add to this list—blocking out harmful bacteria from water.

The discovery__3__(make) by a team consisting of scientists from the Massachusetts Institute of Technology (MIT) and high school students__4__were seeking a natural water filter—one that would help communities in developing countries that do not have__5__(accessible) to modern water filter systems.

The__6__(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__7__(contain) red dye particles of different sizes through.__8__their amazement, they found that it was effective in trapping all the particles.__9__(encourage), the team conducted__10__experiment，this time with water that contained bacteria. Sure enough，the sapwood held back 99% of the bacteria，allowing only 1% to flow through.

Answer 1

【答案】

【1】that

【2】importantly

【3】was made

【4】who/that

【5】access

【6】researchers

【7】containing

【8】To

【9】Encouraged

【10】another

【解析】

【1】 考查同位语从句。＂__1__trees are vital to our life＂作The truth的同位语，所填词在同位语从句不作句子成分，故用that。

【2】 考查副词。most importantly(最重要的是)置于句首，修饰后面的整个句子，相当于It is the most important that...

【3】 考查时态和语态。本句在讲述过去的事情，故用一般过去时；主语the discovery与make为被动关系，故用被动语态。

【4】 考查定语从句。先行词为high school students，将先行词代入定语从句后为：The high school students were seeking a natural water filter.由此可知关系词在定语从句中作主语且指＂人＂，故用who/that引导。

【5】 考查动词短语。have access to＂接近，可以利用＂。

【6】 考查名词。根据上下文语境可知此处应该填入名词复数researchers。此处表示＂这些由Professor Rohit Karnik带领的研究人员决定求助于树木＂。

【7】 考查非谓语动词。water与contain是逻辑上的主动关系，故用现在分词作后置定语。

【8】 考查介词短语。to one's amazement＂使某人吃惊的是＂。

【9】 9考查非谓语动词。encourage与主语the team之间为逻辑上的被动关系，所以用过去分词作状语。

【10】 考查限定词。上文已说到他们做了一个实验，此处表示受到第一个实验结果的鼓舞，他们又做了一个实验。another＂另一，再一＂。