Réponse:
a. The Aboriginal art exhibition which they visited in Sydney, was amazing
b. I went to the top of Sydney Eye, which is the tallest building in Sydney.
c. The Harbour Bridge ø 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 amzing acoustics.
J'espère que ça t'a aidé!!:)