In American, a friend inviting you to a restaurant doesn't mean that he or she will pay for the meal ______ you are told ahead.
Do you know who to take part in the competition?
—Did your sisters go to the concert last night? —No, we went to my aunt's birthday party.
—David, someone called you last night. —Oh, who was ?
We all think Bill istaller of the two.
—Lucy, it's too hot. Put the meat in the fridge, or it will bad. —OK, Mum!