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  3. The United States’ predominance in science and technology is fading, a report released this month by the National Science Board

The United States’ predominance in science and technology is fading, a report released this month by the National Science Board

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问题     The United States’ predominance in science and technology is fading, a report released this month by the National Science Board warns. The report underlines what a powerhouse the United States【C1】_____in knowledge- and technology-intensive industries, including high-tech manufacturing, energy and drug industry. All in all, those industries【C2】_____for about 40 percent of American economic output, more than in any other developed country, it finds.
    But with the rise of increasingly【C3】_____emerging economies, the report suggests, underinvestment in research and development might translate into a less【C4】________, less productive American economy in the future.
    The world is【C5】_____a "dramatic shift in the global scientific landscape," said Dan E. Arvizu, chairman of the National Science Board "Emerging economies understand the【C6】_____science and innovation play in the global marketplace and in economic competitiveness and have increasingly placed a【C7】_____on building their capacity in science and technology," he said.
    The Asian economies now perform a larger【C8】_____of global research and development than the United States does. China carries out about as much high-tech manufacturing as the United States does, the report found.
    But the report also highlights some important market sectors where the United States appears to be falling behind. More【C9】_____, the report finds that the United States might be【C10】_____in the research and development spending that scientists say is the most important fuel for future innovation. Moreover, many countries spend larger and faster-growing proportions of their economic output on research.
A)account B)role C)decays D)share
E)lagging F)effect G)dominant H)directly
I)worryingly J)remains K)priority L)concern
M)limited N)undergoing O)competitive
【C3】
选项
答案O
解析 该空位于副词increasingly之后，名词emerging economies“新兴经济体”之前，故考虑填入形容词。该句谈及新兴经济体对美国产生的负面影响(less productive)，故推知这里应该填积极语义的词来形容新兴经济体，故可排除limited；而新兴经济起只是在崛起和快速发展中，还没达到dominant“主导”的程度，故选competitive，表示新兴经济体颇具竞争力。
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