— does it take you to go to work on foot? — About half an hour. A. How far B. How long C. How much
-----Who taught _________Japanese?----I learned it by ______________.
Humans can’t live _______air.
---Oh, you have a headache and a cough. _______have you been like this?---Three days.
I prefer_____ to ______.
— I’m sorry for losing your book .— ______________