A: Where do you think is the best place Sam's been to?
B: I think it's the film studio.
A: I don't think so. I think it's the oil rig.
Who's the nastiest person Sam has met?
A: I think the nastiest one was the man who didn't let Sam pass.
B: And what was Sam's most exciting adventure, in your opinion?
A: I am sure it was roller-coaster.
B: I'd rather say Sam was scared. What was his worst moment?
A: I think his worst moment was when he was on a roller-coaster.
B: I think so, too.