Use the appropriate article if necessary 1 last year l went to london 2 i visited london planetarium 3 artificial sky planetarium i could million of stars 4 he lives in room 47 5 house beingn built

1 Last year L went to London.
2 I visited the London Planetarium.
3 In the artificial sky of the Planetarium I could see a million of stars.
4 He lives in room 47.
5 Is the house being built?