41．Which of the following is the best title of the passage?

　　A．The future energy—SPS

　　B．The concept of SPS

　　C．Humans and SPS

　　D．Advantages of SPS

　　答案　A　[文章首先提出SPS的概念，接着提出批评者的观点，引出研究SPS的重要性以及其深远的意义。A项概括了文章主旨。]

　　42．It can be inferred from the passage that ________.

　　A．SPS has been understood by most people

　　B．SPS can benefit environment and economy

　　C．SPS is being used in developing countries

　　D．SPS research has cost too much money

　　答案　B　[根据最后一段中“We believe that，provided that research continues to show that SPS is environmentally and economically attractive.”可知，目前研究表明SPS对环境和经济有利。]

　　43．What's the main idea of the third paragraph?

　　A．Present energy sources face serious problems.

　　B．Where to get energy sources in the future.

　　C．The importance of controlling the world population.

　　D．The importance of exploring new energy sources.

　　答案　D　[第3段论述了我们人类今后需要更多的能源，而世界人口在增长，贫穷国家需要发展，现有能源面临严重问题，所以我们要考虑研究探索其他的新能源。因此D项为最佳答案。]

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