The key to the industrialization of space is the U. S. space shuttle.【51】it, astronauts will acquire a workhouse vehicle【52】of f

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问题     The key to the industrialization of space is the U. S. space shuttle.【51】it, astronauts will acquire a workhouse vehicle【52】of flying into space and returning many times. 【53】by reusable rockets that can lift a load of 65 000 pounds, the shuttle will carry devices for scientific inquiry, as well as a variety of military hardware.【54】more significantly, it will deliver materials and machines into space for industrial purposes【55】two decades ago when "sputnik" (artificial satellite) was added to the vocabulary. In short, the【56】importance of the shuttle lies in its promise as an economic tool.
    What makes the space shuttle【57】is that it takes off like a rocket but lands like an air plane. 【58】when it has accomplished its mission, it can be ready for【59】trip in about two weeks.
    The space shuttle, the world’s first true spaceship, is a magnificent step【60】making the impossible possible for the benefit and survival of man.

选项 A、capable
B、suitable
C、efficient
D、fit

答案A

解析 本空提供的四个形容词从词义上看似乎都说得通,但从语法上看似乎只有capable“能够”能同介词词组of doing sth. 连用,是固定搭配。suitable“适合;适于”一般与for连用。fit“适当;适宜的”一般与介词for或动词不定式to do连用。efficient意为“高效的;(指人)有能力的,胜任的”,如可以说:an efficient secretary(能干的秘书)等等。
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