Circle the correct words.
A: Have you finished/Did you finish the book yet?
B: No, I gave up. It was too boring. What happened in the end?
A: They returned safely to their own planet.
B: But their planet has been destroyed/ had been destroyed years before.
A: Ah, well, in the end we found out that it 'hadn't really happened/ hadn't really been happening. The spaceship's captain had dreamt / had been dreaming. (...)