Bill was doing a lot of physical exercise to build up his _______.
—— There will be a storm soon. —— I am afrai?_____.
_____ heat is different from temperature?
_____ his face, the young man must be over 20.
He said_____his sister had passed the entrance examination of college, and_____she would go to college in about 20 days.
—— Would you like some wine? —— Yes, just _____.