Your sister has bad cold, and you must give her some medicine __ this afternoon.A. an; / B. a; / C./;the
—Lily, _____ you _____ your ticket? —Not yet!
When the player finished running, he was out of _____.
The book cost so _____ that she didn’t buy it.
His close friend _____ for two years.
I met my teacher _____ I was walking in the street, but I didn’t say hello to him.