full transcript
#### From the Ted Talk by Elon Musk: The mind behind Tesla, SpaceX, SolarCity ...

## Unscramble the Blue Letters

CA: Wow. Reusable rockets.EM: Yes. (Applause) And so what a lot of people don't realize is, the cost of the fuel, of the propellant, is very small. It's much like on a jet. So the cost of the propellant is about .3 percent of the cost of the rocket. So it's possible to achieve, let's say, rolughy 100-fold improvement in the cost of spaceflight if you can effectively reuse the roekct. That's why it's so important. Every mode of transport that we use, whether it's paenls, trains, automobiles, bikes, horses, is rsleabue, but not rckoets. So we must solve this problem in oderr to become a space-faring civilization.
## Open Cloze

CA: Wow. Reusable rockets.EM: Yes. (Applause) And so what a lot of people don't realize is, the cost of the fuel, of the propellant, is very small. It's much like on a jet. So the cost of the propellant is about .3 percent of the cost of the rocket. So it's possible to achieve, let's say, **_______** 100-fold improvement in the cost of spaceflight if you can effectively reuse the **______**. That's why it's so important. Every mode of transport that we use, whether it's **______**, trains, automobiles, bikes, horses, is **________**, but not **_______**. So we must solve this problem in **_____** to become a space-faring civilization.
## Solution

- planes
- order
- reusable
- rocket
- roughly
- rockets

## Original Text

CA: Wow. Reusable rockets.EM: Yes. (Applause) And so what a lot of people don't realize is, the cost of the fuel, of the propellant, is very small. It's much like on a jet. So the cost of the propellant is about .3 percent of the cost of the rocket. So it's possible to achieve, let's say, roughly 100-fold improvement in the cost of spaceflight if you can effectively reuse the rocket. That's why it's so important. Every mode of transport that we use, whether it's planes, trains, automobiles, bikes, horses, is reusable, but not rockets. So we must solve this problem in order to become a space-faring civilization.
## Frequently Occurring Word Combinations

### ngrams of length 2

collocation |
frequency |

natural gas |
4 |

space shuttle |
3 |

sustainable energy |
2 |

sustainable means |
2 |

electric car |
2 |

power plant |
2 |

percent efficiency |
2 |

power generation |
2 |

sustainable electricity |
2 |

drag coefficient |
2 |

good news |
2 |

expensive car |
2 |

charging stations |
2 |

solar system |
2 |

utility bill |
2 |

distributed utility |
2 |

## Important Words

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