1)to visit Buckingham Palace 2)to see Nelson's Column 3)to watch animals in London Zoo 4)to send a letter to his parents

2) Have you seen Nelson\'s Column yet? - No, I have not seen it yet.3) Have you watched animals in London Zoo yet? - I\'ve just watched them.4) Have you sent a letter to his parrents yet? - I have already sent it.5) Have you bought some gifts to his parents yet? - I\'ve just bought them.6) Have you fed birds on Trafalgar Square Questions yet? - No, I have not fed them yet.