Mr. "Chris" Cross's Crossword

123456
Across
  1. 2. ___ and paper
  2. 4. Man's best friend
  3. 5. This
  4. 6. The Red Planet
Down
  1. 1. See through it, also the name of a OS
  2. 3. We have it in school, play on it
  3. 5. Vroom