5. Why did Pete say that his story was sad?

Решение:

Питер сказал: "But my story is short and very sad. We have no key to our room. It is in the hall." История была грустной, потому что у них не было ключа от номера, и им пришлось спать в холле.

Ответ: Pete said his story was sad because they had no key to their room and had to sleep in the hall.