2. 外语
  3. A. attempt B. charged C. crucial D. delicate E. essentially F. eventually G. expended H. fraction I. individual

A. attempt B. charged C. crucial D. delicate E. essentially F. eventually G. expended H. fraction I. individual

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问题     A. attempt    B. charged    C. crucial   D. delicate   E. essentially
    F. eventually G. expended   H. fraction  I. individual J. maintain
    K. minority   L. negligible M. scrapping N. slashing   O. upsurging
    Space X launched a cheaper, partially-used rocket into orbit. That’s a stride toward【C1】________the price tag of sending payload to space. Successfully flying reusable rockets is a【C2】________step toward the dream of sending people to Mars. Until now, rockets have almost all been single-use. Once the fuel is【C3】________, a rocket stage plummets to Earth, resulting in the destruction of extremely expensive equipment that costs tens of millions of dollars to build.
    Its founder has likened that to【C4】________a 747 jet after one flight, which would make air travel impossibly expensive. He has suggested that rocket launches could【C5】________be much cheaper since the cost of the rocket propellants are less than 1 percent of the full-price ticket for a launch. So, if a rocket could be simply refueled like a jetliner for another flight, the cost of space travel could drop to a【C6】________of what it is now. The stresses of spaceflight on reused boosters, however, are much greater than those on jetliners. The economics will depend on how many times a booster can be flown, and how much the 【C7】________expense will be to repair the booster each time.
    Reusable spaceships are not a new idea. NASA’s space shuttles were the first real【C8】________at a reusable spaceship, but the shuttles proved more【C9】________than hoped, requiring an army of technicians to【C10】________them between flights. As a result, they ended up being more expensive than expendable rockets.
【C1】
选项
答案N
解析 空格前是介词，因此空格处应为介词的宾语。由空格后的名词短语the price tag of…可知，空格处应填入一个动名词作介词的宾语，同时与后面的名词短语构成动宾结构。上文提到，太空探索技术公司将一枚价格较为低廉的部分用过的火箭发射进入了轨道，由此可知，这一举动会降低发射火箭的价格，故N项slashing“大幅度削减”为答案。
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