Question

【题目】阅读下面材料，在空白处填入适当的内容（1个单词）或括号内单词的正确形式。

It is not a secret 【1】 trees are vital to our life. 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 【4】 (consist) of scientists from the Massachusetts Institute of Technology (MIT) and high school students 【5】 were seeking a natural water filter(过滤)—one that would help communities in developing countries that do not have 【6】 (accessible) to modern water filter systems.

The 【7】 (research), led by Professor Rohit Karnik, decided to turn【8】______ 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. To their 【9】 (amaze), they found that it was effective in trapping all the particles. Greatly 【10】 (encourage), the team conducted another 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】consisting

【5】who/that

【6】access

【7】researchers

【8】to

【9】amazement

【10】encouraged

【解析】

试题分析：树木作用巨大。最新研究表明，它们能去除水中的细菌。

【1】that 考查主语从句。此处it是形式主语，后面是主语从句，又因为从句中不缺少成分，故选用从属连词that。

【2】importantly 考查形容词和副词的转换。此处most importantly是在修饰谓语动词provide，故用副词。句意：它们为我们提供了食物和木头，更重要的是提供了氧气。

【3】was made 考查谓语动词的时态和语态。the discovery和make之间是被动关系，故用被动语态。动作发生在过去，故用一般过去时。

【4】consisting 考查非谓语动词。此处是现在分词短语“consisting of scientists”作后置定语，修饰team。因为被修饰词team和consist之间是主动关系，故用现在分词。

【5】who/that 考查定语从句。分析句子可知，此处为定语从句，因为先行词是students，并且引导词在定语从句中充当主语，故用who/that。

【6】access 考查形容词和名词的转换。have access to意为“使用，接近，可以利用”，是固定搭配。

【7】researchers 考查动词和名词的转换。句意：研究人员，在Professor Rohit Karnik的领导下，决定向树木求助。根据句意，此处表示人，故写成researchers。

【8】to 考查介词。turn to“向……求助”，为固定搭配。

【9】amazement 考查名词。to one's amazement是固定结构，表示“令某人惊讶的是”。

【10】encouraged 考查非谓语动词。此处为分词作状语，主语team与encourage之间是动宾关系，故选用过去分词“encouraged”。