正确答案: D

Once

题目：第59题应选：

解析：【解析】句意为：__________在进行中，煤炭可以燃烧几十年，甚至几个世纪四个选项：A．Yet，然而；B．Unless，除非；C．Although，尽管；D．Once，一旦。

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学习资料的答案和解析：

[单选题]The designing of a satellite in the heavenly environment is not absolutely an easy job.

by no means

解析：【答案】D【解析】by all means“一定”，by any means“无论如何”，by every means用得较少，意为“竭尽全力”，相当于by all means，by no means“决不”。

[单选题]Techniques to employ the energy of the sun are being developed.

store

[单选题]第62题应选：

回答下面的题目：UndergrOund Coal Fires Coal burning deep underground in China, India and Indonesia is threatening the environment and human life, scientists have warned. These large scale 51 blazes ( 火焰 ) cause the ground temperature to heat up and kill surrounding vegetation, produce greenhouse gases and can 52 ignite ( 点燃) forest fires, a group of scientists told the annual meeting of the American Association for the Advancement of Science in Denver. The resulting 53 of poisonous elements like mercury can also pollute local water sources and soils, they warned."Coal fires are a global disaster," said Associate Professor Glenn Stracher of East Georgia Collage in Swainsboro, USA. But 54 few people know about them.Coal can heat up on its own, and eventually catch fire and burn, if there is a continuous oxygen supply. The heat produced is not caused to 55 and under the right combinations of sunlight and oxygen, can trigger spontaneous ( 自发的 ) catching fire and burning. This can occur underground, in coal stockpiles, abandoned mines or even as coal is transported. 56 fires in China consume up to 200 million tons of coal per year, delegates were told. In 57 , the U.S. economy consumes about one billion tons of coal annually, said Stracher, 58 analysis of the likely impact of coal fires has been accepted for publication in the International Joomal of Acoal Ecology.. 59 underway, coal fires can burn for decades, even centuries. In the process, they release large 60 of greenhouse gases, poisonous fumes and black particles into the atmosphere.The members of the panel discussed the 61 these fires may be having on global and regional climate change, and agreed that the underground nature of the fires makes them difficult to 62Ultimately, the remote sensing and other techniques should allow scientists to 63 how much carbon dioxide these fires are emitting ( 释放 ). One suggested 64 of containing the fires was presented by Gary Colaizzi, of the engineering firm Goodson, which has developed a heat-resistant grout ( 灌浆 ), which is designed to be pumped into the coal fire to 65 the oxygen supply.第51题应选：

detect

解析：【解析】句意为：他们一致认为地下火灾的性质使得他们很难__________。四个选项：A．develop，发展；B．relieve，释放；C．detect，察觉；D．supply，供应。

[单选题]John is eligible for this job.

recommended 

解析：【题 干】John的工作很称职 。 【解 析】考查形容语。题干划线词eligible意为“合格的，有资格当选的”，所以正确答案为B。本题属于划线词与正确选项并非同义词或者近义词，而是基本含义相同、同时能使句子通顺的单词替换。

[单选题]请在第_____处填上正确答案。

根据以下资料，回答下面的题目。 请在第_____处填上正确答案。

needs   

解析：此处句意为：他们不加强建设标准，以减少供暖和空调的……。根据后文的reduce automobile use，此处用“需求”比较适合。所以选A项needs。