QVlll. Complete the crossword puzzle below.

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Across
  1. 4. It helps in maintaining body balance.
  2. 5. A place where two bones meet.
Down
  1. 1. Method of keeping surroundings, houses, clothes and drains clean.
  2. 2. An inclined plane which revolves round a cylindrical body.
  3. 3. A mixture in which two substances are uniformly mixed together in varying proportion.