Kitty: Perhaps there will be more people. There may not be enough food.

Peter: I hope not.

Kally: Perhaps there won’t be enough room for everybody to live on the earth, either.

Alice: I don’t think so. Perhaps people will be able to live on the moon.

Danny : I hope so, but I don’t think so.

Kally: Perhaps people will be able to live in space stations on the moon.

Peter: Perhaps they will be able to grow vegetables there.