2: a question
3: the best
4: the airport
5: a postcard
6: a ticket; the concert
7: the name; the director; the film
8: a jacket and a shirt; the jacket... and the shirt...
9: a boy and a girl; the boy... and the girl...(вторичное употребление, значит опред. артикль)
63.3
3- a bicycle
5- the roof
6- the play
7- a difficult language
8- a cigarette
9- the next train
10- a nice day