对下列划线词解释有误的一项是（ ）

Pet raisers should look after their pets carefully, _______ they won’t be allowed to keep them any longer.

We didn’t know where it was ________ the other tourists in our group stayed for the night until the tsunami was over.

It was when searching for the lost book whose cover was missing ______ a secret letter addressed to his mother.

Hello! May Flower Hotel.Can I help you?-Do you have a room for this weekend? [ ]