ch sounds like /k/ and /sh/

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Across
  1. 3. person who cooks
  2. 4. someone who fixes cars and planes
  3. 6. a slide
  4. 7. the study of chemicals
  5. 9. tropical flower
Down
  1. 1. a plan
  2. 2. having to do with technology
  3. 5. the V shape
  4. 7. unorganized activity
  5. 8. the sound keeps going