Crossword

1234567
Across
  1. 1. a title of respect prefixed to a man's name or position
  2. 4. ISO 3166 of the dominican republic
  3. 6. an unspecified or unknown thing
  4. 7. used to express an intention or inclination. tense of "will"
Down
  1. 1. with respect to mathematics
  2. 2. The act of replacing a value by another that is approximately equal but has a more explicit representation
  3. 3. last name of the best biology teacher on earth
  4. 5. abbr. for Islamic State