play under and it goes before 'cover'
strangle
The word "before" begins the subordinate clause in the sentence.
blacklist
Brave
bag
Red
Ginger
The word that can go before both "over page" and "gap" is "bridging."
Wavelength is one, but there are probobly more.
tear heating air conditioning
The comma goes before the word "but." For example: I was going to spell the word "comma" right, but then I fell into a coma.