For each numbered blank in the following passage there four choices labeled [A], [B], [C], and [D], choose the best one and put your choice in the ANSWER SHEET by blackening (15 points)
The key to the industrialization of space is the U.S. space shuttle. __46__ it, astronauts will acquire a workhouse vehicle __47__ of flying into space and returning many times. __48__ by reusable rockets that can lift a load of 65, 000 pounds, the shuttle will carry devices for scientific inquiry, as __49__ as a variety of military hardware. __50__ more significantly, it will __51__ materials and machines into space for industrial purposes __52__ two decades ago when “sputnik” (artificial satellite) was __53__ to vocabulary. In short, the __54__ importance of the shuttle lies in its __55__ as an economic tool.
What makes the space shuttle __56__ is that it takes off like a rocket but lands like an airplane. __57__, when it has accomplished its __58__, 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.
