Question

   We are now living in the modern society. Most of the energy we use for heating, lighting, transportation and manufacturing (制造業(yè)) 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__小題1:___ the energy.
There are three main disadvantages to using these fuels. Firstly, they are causing climate problems because of the G_小題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__小題3:__ left to burn. Thirdly, they are not very efficient. The internal combustion engine (內(nèi)燃機(jī)) 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__小題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 (分離) it from water c_小題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__小題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__小題7:___ oil and gas reserves(儲(chǔ)藏量) elsewhere, the effects on the planet’s climate will be bad if they are used.

Answer 1

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

試題分析：本文講述了我們的礦產(chǎn)資源。我們的礦產(chǎn)資源都是有限的，不可再生的�，F(xiàn)在的石油，天然氣，因?yàn)槿紵�的時(shí)候會(huì)放出熱量，所以會(huì)引發(fā)溫室效應(yīng)�？茖W(xué)家們正在積極探索新的能源，以便使我們能夠使用更干凈，更清潔的能源。但是現(xiàn)實(shí)是這還需要很大的努力。
小題1:考查動(dòng)詞。句意：當(dāng)我們燒燃料的時(shí)候會(huì)釋放熱量，這些熱量提供了能量。Provide動(dòng)詞，提供。        小題2:考查名詞。句意； 因?yàn)闇厥倚��?yīng)，他們正在引起氣候的變化。Greenhouse Effect溫室效應(yīng)。
小題3:考查不定代詞。句意：當(dāng)我們用光這些燃料的時(shí)候，我們就沒有什么可以燒的了。 Nothing不定代詞，什么都沒有。
小題4: 考查名詞所有格。句意：地球的三分之二的表面是水。名詞所有格是在名詞之后加’s，表示……的。
小題5:考查副詞。句意：?jiǎn)栴}是把氫從水中分離出來很便宜，但是很難儲(chǔ)存。Cheaply副詞，便宜地。
小題6:考查動(dòng)詞。句意：解決這些問題是十分迫切的難題。Solve動(dòng)詞，解決。動(dòng)名詞短語(yǔ)做主語(yǔ)，謂語(yǔ)動(dòng)詞用三單。
小題7:考查形容詞。句意；在某處仍然有很大的石油及天然氣的儲(chǔ)量。large大量的。