Воткните артикль пожалуйста (a/an, the , - )2)...Sofia is...capital

Вставьте артикль пожалуйста (a/an, the , - )

2)...Sofia is...capital of...Bulgaria
3)At...party each child got...box of...chocolates
4)They live in...south of...Sweden
5)....Volga is...longest river in...western part of Russia
6)....Recreation areas often appear in...suburbs of...big cities
7)Max, put on clean shirt...black one is dirty
8)....Sun is shining brightly in...blue sky
9)Where is...money i have put on...table? It is on...shelf below...mirror
10)Have you done...exercises yet, Bob?