Complete the crossword

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Across
  1. 3. Argue about (a subject) especially in a formal manner.
  2. 6. Difficult to handle or use.
  3. 9. A thing done successfully with effort, skill or courage.
Down
  1. 1. An account of someone’s life written by someone else.
  2. 2. The rough silk enveloping a silkworm’s cocoon.
  3. 3. Brightness that blinds someone temporarily
  4. 4. Give support, confidence or hope to someone
  5. 5. The assembled spectators or listeners at a public event such as a play or a concert.
  6. 7. Showing a readiness to give more of something.
  7. 8. Of or concerning history or past events.