The sentence doesn’t make any ,no matter how you read it.

I want to know ______ you will be backbefore 8:00 tomorrow morning.

The manager had fallen asleep where he ____without undressing. [ ]

Hello，Jane，have you arrived at the hotel—–Yeah，busyI’llcall back later

We must apply what we have learned to our daily work because in no case _____ from practice.