We are now living in the modern society. Most of the energy we use for heatin

题型：不详难度：来源：

   We are now living in the modern society. Most of the energy we use for heating, lighting, transportation and manufacturing (制造业) comes from fossil (化石) fuels. These are carbon-based fuels from oil, coal and natural gas. When we burn these fuels we release heat which p__小题1:___ the energy.
There are three main disadvantages to using these fuels. Firstly, they are causing climate problems because of the G_小题2:___ Effect. When we burn fossil fuels they produce carbon dioxide which causes global warming. Secondly, when we have used up all our coal, oil and natural gas, we will have n__小题3:__ left to burn. Thirdly, they are not very efficient. The internal combustion engine (内燃机) that we use in most cars, trucks and buses, for example, is only about 14% efficient.
Scientists are working on another fuel—hydrogen. There are a couple of advantages to using hydrogen as a fuel. Firstly, because two-thirds of the e__小题4:__ surface is water and water is made of hydrogen and oxygen. There is an almost unlimited supply of hydrogen. Secondly, burning hydrogen does not cause global warming. Thirdly, it is much more efficient than carbon-based fuels.
Unfortunately there are problems with hydrogen at the present time: there is the problem of separating (分离) it from water c_小题5:___, and there is the difficulty of storing it. It can be stored under pressure but high pressure tanks are far from safe. It can also be stored as a liquid but only at extremely low temperatures. It seems likely, therefore, that there will have to be a completely new technology before hydrogen replaces fossil fuels. S__小题6:___ these problems is an urgent (急迫的) matter. Although China, India and Australia have huge amounts of cheap coal, and there are still l__小题7:___ oil and gas reserves(储藏量) elsewhere, the effects on the planet’s climate will be bad if they are used.

答案

小题1:provides
小题2:greenhouse
小题3:nothing
小题4:earth"s
小题5:cheaply
小题6:Solving
小题7:large

解析

试题分析：本文讲述了我们的矿产资源。我们的矿产资源都是有限的，不可再生的。现在的石油，天然气，因为燃烧的时候会放出热量，所以会引发温室效应。科学家们正在积极探索新的能源，以便使我们能够使用更干净，更清洁的能源。但是现实是这还需要很大的努力。
小题1:考查动词。句意：当我们烧燃料的时候会释放热量，这些热量提供了能量。Provide动词，提供。        小题2:考查名词。句意； 因为温室效应，他们正在引起气候的变化。Greenhouse Effect温室效应。
小题3:考查不定代词。句意：当我们用光这些燃料的时候，我们就没有什么可以烧的了。 Nothing不定代词，什么都没有。
小题4: 考查名词所有格。句意：地球的三分之二的表面是水。名词所有格是在名词之后加’s，表示……的。
小题5:考查副词。句意：问题是把氢从水中分离出来很便宜，但是很难储存。Cheaply副词，便宜地。
小题6:考查动词。句意：解决这些问题是十分迫切的难题。Solve动词，解决。动名词短语做主语，谓语动词用三单。
小题7:考查形容词。句意；在某处仍然有很大的石油及天然气的储量。large大量的。