Setze die unbestimmten Artikel (indefinete articles) „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.