5.1 reading vocabulary

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Across
  1. 5. a noun meaning a huge gap or obstacle
  2. 6. a noun meaning think or imagine
  3. 7. a verb meaning awareness or realise
  4. 9. a group of people sing together
Down
  1. 1. person who take part in the research or events
  2. 2. a way of cure patients
  3. 3. a noun meaning a person is not present or not appear on-site
  4. 4. an adjective meaning very noticeable and unusual
  5. 8. a noun meaning proof in research