Fill in the gap
The jacket has really gone _____ of style; no one wear that cut any more.
The jacket has really gone OUT of style; no one wear that cut any more.
He backed up all his data just ____ case the system crashed during an update.
He backed up all his data just IN case the system crashed during an update.
Many students struggle to stay ____ track when studying online without any structures.
Many students struggle to stay ON track when studying online without any structures.
She has managed to live well, even _____ a tight budget, by planning her expenses carefully.
She has managed to live well, even ON a tight budget, by planning her expenses carefully.
The restaurant is popular not only for its fresh ingredients, but also ____ word of mouth.
The restaurant is popular not only for its fresh ingredients, but also THROUGH word of mouth.