Read the dialogue and choose the correct options

A: What do you think I [ought to see|ought to have seen] in London first?

B: I think, historical places. When I was in London, I [am able to see|was able to see] Windsor Castle, and you definitely [should visit|should have visited] Madame Tussauds.

A: I have never heard of this place! What is it?

B: This is the most famous museum of wax figures.

A: Wow! Sounds interesting! [Do I have to|Did I have to] buy tickets in advance?

B: You [don't need to|didn't need to], but you [had better|had been better] do it. I [can't|couldn't] do it at first because no tickets were left at the box office. So I [must|had to] return the next day.