Bonsoir,

a) Je ne sais pas

b) I went to the top of the Sydney eye which is the tallest building in Sydney.

c) The Harbour bridge which needs 272,000 l of paint to cover is closed for painting.

d) The postcard which I bought was cheap.

e) The Opera House which is where some of the best singers in the world perform has amazing acoustics.

Voilà, j'espère t'avoir t'aider même avec les quelques jours de retard...