题目内容
Scientists are very interested in the universe,and they always want to know more about it. Years ago they knew many things about the 11 . They knew how big it was and 12 it was from the earth， 13 they still wanted to know more. They thought the best way was to 14 men to the moon. The moon is about 384,000 kilometres away from the earth. A common plane cannot 15 to the moon because the 16 reaches only 240 kilometres away from the earth. But 17 can fly even when there is no air. That is a rocket(火箭) .
How can a rocket fly? If you want to know,get a balloon (气球) and then blow it up until it is quite big. Do not tie up(捆绑) the neck of the balloon,but let it go!The balloon will fly off 18 the air very quickly. The air inside the balloon can go through the air. It does not need wings like a plane.
There is gas(气体) in the rocket，so it can fly out into 19 . Rockets with men in them have been to the moon. Several rockets without men in them have already flown to 20 planets much farther away than the moon. One day,rockets may be able to go to any place in space.
( ) 11. A. star B. moon
C. sun D. planet
( ) 12. A. how much B. how long
C. how many D. how far
( ) 13. A. so B. and
C. but D. or
( ) 14. A. send B. put
C. choose D. bring
( ) 15. A. walk B. fly
C. climb D. run
( ) 16. A. air B. light
C. Jupiter D. Mars
( ) 17. A. anything B. nothing
C. something D. none
( ) 18. A. by B. on
C. from D. through
( ) 19. A. space B. air
C. cloud D. station
( ) 20. A. other B. another
C. the other D. others
11. B由下文可知，此处是指多年前他们知道了很多有关月球的情况
12. D
13. C虽然知道了很多，但他们还想了解更多。
14. A 15. B 16. A 17. C 18. D
19. A fly out into space意为“飞人太空”，符合语境。
20. A
