um-hum couldn't
Couldn't.
Um-hum, could.
Prepayment and postpayment mechanisms do nothing to ensure proper payments.
It shouldn't be like that.
The same procedure is always used with the key on leaving the room.
A group of men are swimming near a boat in dry dock.
A man rides a bike near a mountain.
The surplus should be used for another purpose than to pay down the deficit.