1. It must have been a good time. 2. Does she sleep through the night? 3. The hallway has a glass wall facing the outside. -- The reader presumes that it is transparent.
Mister Micawber2. Does she sleep through the night?
Can you explain your choice of 'the night' over 'nights'. I thought 'the night' is more appropriate when you are referring to a specific point of a night. Here we are referring the entire duration of a night.