I. Read the passage and fill in the gaps with ONE word given in the box. (1pt)

      serious            between               boys             is                   face                          

       Acne (11)…………… a skin condition. It causes small, red spots on the (12)…………………..and the back. It affects 70-80% of young people (13)………………12 and 30. More girls have acne than (14)……………. It’s not a (15)…………………... disease but young people want to avoid it.