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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 E) directly I) limited M) share
B) competitive F) dominant J) priority N) undergoing
C) concern G) effect K) remains O) worryingly
D) decays H) lagging L) role
【C3】
选项
答案B
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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