There is no point advocating banning smoking in public ________ the law is introduced.
I’d like Jane, _____Joan, to go to the farewell party on behalf of (代表) our class.
If we________ , we can realize the progress we have made in space research.
They arrived at the farmhouse, in front of which _________.
—Who are those with the flags?—A group________itself the League for Peace.
When I was you age, I dared to go out alone at night, ________ you?