四级crossword-1

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Across
  1. 2. challenge a difficult task that tests ability (9 letters)
  2. 9. essential completely necessary and important (9 letters)
  3. 11. analyse to examine something in detail (7 letters)
  4. 12. attempt to try to do something (7 letters)
Down
  1. 1. benefit an advantage or gain from something (7 letters)
  2. 3. aware knowing and understanding something (5 letters)
  3. 4. efficient working well without wasting time/energy (8 letters)
  4. 5. consider to think carefully about something (8 letters)
  5. 6. determine to decide or fix something clearly (9 letters)
  6. 7. explore to travel around or discover new things (7 letters)
  7. 8. generate to produce or create something (8 letters)
  8. 10. approach a way of dealing with a situation (8 letters)