Scientists have  1   wanted to know more about the universe. Years ago they knew many things about the moon. They knew how big it was and how far away it was from the earth. But they wanted to know  2   about it. They thought the best way  3   men to the moon.

 The moon is about 38,400 kilometers away from the earth. A plane cannot fly to the moon because the air  4   only 240 kilometers away from the earth. But  5   can fly even when there is no air. That is a rocket(火箭).

 How does a rocket fly? There is gas in the rocket. When the gas  6   very hot inside the rocket, it will rush out of the end of the rocket,  7   it can make the rocket  8   up into the sky.

 Rockets can fly far out into space. Rockets with men in them have been to the moon. Several rockets without men in them  9   to another planet much farther away than the moon. One day rockets  10   be able to go to any place in space.

 1. A. ever    B. never    C. always    D. already

 2. A. much     B. more     C. many thing   D. a lot

 3. A. to send    B. to take    C. to carry    D. to have

 4. A. is    B. are      C. travels   D. reaches

 5. A. it    B. that     C. something   D. someone

 6. A. become   B. get    C. make       D. is made

 7. A. so    B. because     C. that     D. for

 8. A. fly     B. flying    C. flies    D. to fly

 9. A. has flown   B. have flown  C. will fly    D. fly

 10. A. can      B. will     C. must     D. many

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