Air, _ __we breathe every day, is around us all the time.
— Oh, must you? Stay a bit longer. It’s been such fun having you. — ____ . I’ve got an early start tomorrow morning.
— Jenny looks hot and dry. — So ____ you if you had a high fever.
With the change of the economic foundation,the entire immense superstructure is _____ rapidly transformed.
As he didn’t have much money, he had to ____ a second- hand computer for his work.
The newspaper reporter interviewed the old man and ___ his family history.