You had better book rooms at the hotel in advance _____you should find no room on your arrival

I promise that she _____ get a nice present on her birthday. —It will be a big surprise to her. [ ]

The mountain village is so beautiful.-Yes.Moreover，________the villagers live，there is fresh air.[ ]

Doyou want another drink ——

He says he knows everything about DIY. ________， I know much more than he does.