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— Do you know sound travels very fast? — Yes. But light travels     than sound. A. as fast as B. ...

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around  only  at least  nearly  
we will notice that it is not moving  we cannot tell whether or not it still exists  it will be brighter than the moon  it is four years that the light we can see will reach us  
travels   traveled   would travel   was traveling  
have to travel a greater distance  move less quickly  travel much quickly  be less powerfull  
as fast as    a little faster than    much faster than    slower than  
Do you know it is where that    where is it that do you know    Do you know where it is that    where do you know it is that  
300,000  two million  400,000  480 times 300,000  
travels    traveled    would travel    was traveling  
bones  air  waves  voice  
at which sound travels  with which sound travels  of which sound travels  for which sound travels  
as fast as    a little faster than    much faster than    slower than