Setze die unbestimmten Artikel  a oder an ein.
  1.  This is pencil.
2.  He's doctor.
3.  Sue eats apple.
4.  Tennis is game.
5.  I see old book.
6.  He is teacher.
7.  She is pupil.
8.  He's got orange.
9.  It's good bike.
10. She's girl.