The air in the country is ________ than ______ in the big city.
Of all the books Dickens wrote, Oliver Twist is probably ________ famous one.
On Alice’s birthday, her mother prepared some food and ________ beer.
Robert saw two boys making fun ________ an old man, and then he stopped them.
Paul learns English ________. He often goes to the English Corner at weekends.
It’s clear that ________ little money he earns can hardly support his family.