Unit 4 A word puzzle

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Across
  1. 4. not in a curve(弯曲)
  2. 6. a train goes underground (地下)
  3. 7. a book that gives a list of words
  4. 9. we can fly in the air on it
  5. 10. the day after today
Down
  1. 1. a long walk
  2. 2. you can buy things in it, bigger than a store
  3. 3. Let's learn.
  4. 5. a word game
  5. 8. you can see it in a cinema