选词:into ; fly ; want ; send ; world ; know ; reach ; with ; anything ; far.
Scinentists have always wanted to know more about the other (1)______in space. Years ago they knew many facts about the moon. They knew how big it was and how far away. But they (2)______to know more about it . They thought and thought. At last they found the only way (3)_____ more was (4)_____ men to the room. The moon is about 384,000 kilometers away from the earth. A plane can't fly to the moon because the air reaches only 240 kilometers. Then there is no air. But (5)_____ can fly even when there is no air. That is rocket. Rocket can fly far out (6)_____ space. Rocket with men in them (7)_____ the moon. Some rocket (8)_____men in them (9)_____ to other planet much (10)_____ away than the moon.