Article a(n), the ou Ø

Complétez avec a(n), the ou 0 (zéro).
1- Il joue au tennis chaque jour. = He plays tennis everyday.
2- Il est docteur. = He is doctor.
3- Il joue du violon. = He plays violin.
4- Il est architecte. = He is architect.
5- Il joue de la flute. = He plays flute.
6- Il est enseignant. = He is teacher.
7- Il n'aime pas le football. = He doesn't like football.
8- Il est éducateur. = He is educator.
9- Il joue du piano tous les jours. = He plays piano everyday.
10- Il est musicien. = He is musician.
11- Il pratique le baseball régulièrement. = He practises baseball regularly.
12- Il est accordéoniste. = He is accordeonist.