A. IT B. WHICH C. WHO D. WHERE III. READ THEN ANSWER THE QUEST...

45. A. it B. which C. who D. where

III. Read then answer the questions.

A rocket uses fuels to make power for the engine. The fuel is set on fire inside the rocket. As the

fuel burns, it creates gases that have great pressure. These gases are blasted out of the rocket engines.

These gases all go out the bottom of the rocket engine where it is open. They come out so fast and with so

much power that the rocket is pushed up. It is pushed up so hard that the rocket overcome the force of

gravity, which always tries to keep everything on the ground. The force that pushes up against the front of

the rocket is called thrust. Unlike an airplane, a rocket doesn’t use wings to help it fly. It just uses the

power and force created by the burning fuel to make enough thrust.