Hugo's spelling puzzle

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Across
  1. 1. the time something happens
  2. 2. groups of letters that make sounds
  3. 5. mammal that swims and love to have fun
  4. 7. at the same time as
  5. 8. _ _ _ _ _ one is it?
Down
  1. 1. a very light colour, the colour of walls
  2. 3. a list of all the letters
  3. 4. cars have 4 of these; they are round
  4. 6. big animal with a trunk
  5. 8. the place something happens